diff --git a/fontc/src/lib.rs b/fontc/src/lib.rs
index 99509a900..59735ccc8 100644
--- a/fontc/src/lib.rs
+++ b/fontc/src/lib.rs
@@ -786,7 +786,7 @@ mod tests {
     };
     use fontdrasil::types::GlyphName;
     use fontir::{
-        ir,
+        ir::{self, KernParticipant},
         orchestration::{Context as FeContext, WorkId as FeWorkIdentifier},
     };
     use indexmap::IndexSet;
@@ -1886,4 +1886,104 @@ mod tests {
     fn captures_created_from_designspace() {
         assert_created_set("wght_var.designspace");
     }
+
+    fn assert_simple_kerning(source: &str) {
+        let temp_dir = tempdir().unwrap();
+        let build_dir = temp_dir.path();
+        let result = compile(Args::for_test(build_dir, source));
+
+        let kerning = result.fe_context.get_kerning();
+
+        let mut groups: Vec<_> = kerning
+            .groups
+            .iter()
+            .map(|(name, entries)| {
+                let mut entries: Vec<_> = entries.iter().map(|e| e.as_str()).collect();
+                entries.sort();
+                (name.as_str(), entries)
+            })
+            .collect();
+        groups.sort();
+
+        let mut kerns: Vec<_> = kerning
+            .kerns
+            .iter()
+            .map(|((side1, side2), values)| {
+                (
+                    side1,
+                    side2,
+                    values
+                        .iter()
+                        .map(|(loc, val)| {
+                            assert_eq!(loc.axis_names().count(), 1, "Should be only weight");
+                            let (axis, pos) = loc.iter().next().unwrap();
+                            (format!("{axis} {}", pos.to_f32()), val.0)
+                        })
+                        .collect::<Vec<_>>(),
+                )
+            })
+            .collect();
+        kerns.sort_by_key(|(side1, side2, _)| (*side1, *side2));
+
+        assert_eq!(
+            (groups, kerns),
+            (
+                vec![
+                    ("public.kern1.brackets", vec!["bracketleft", "bracketright"],),
+                    ("public.kern2.brackets", vec!["bracketleft", "bracketright"],)
+                ],
+                vec![
+                    (
+                        &KernParticipant::Glyph("bracketleft".into()),
+                        &KernParticipant::Glyph("bracketright".into()),
+                        vec![
+                            ("Weight 0".to_string(), -300.0),
+                            ("Weight 1".to_string(), -150.0)
+                        ],
+                    ),
+                    (
+                        &KernParticipant::Glyph("exclam".into()),
+                        &KernParticipant::Glyph("exclam".into()),
+                        vec![
+                            ("Weight 0".to_string(), -360.0),
+                            ("Weight 1".to_string(), -100.0)
+                        ],
+                    ),
+                    (
+                        &KernParticipant::Glyph("exclam".into()),
+                        &KernParticipant::Glyph("hyphen".into()),
+                        vec![("Weight 0".to_string(), 20.0),],
+                    ),
+                    (
+                        &KernParticipant::Glyph("exclam".into()),
+                        &KernParticipant::Group("public.kern2.brackets".into()),
+                        vec![("Weight 0".to_string(), -160.0),],
+                    ),
+                    (
+                        &KernParticipant::Glyph("hyphen".into()),
+                        &KernParticipant::Glyph("hyphen".into()),
+                        vec![
+                            ("Weight 0".to_string(), -150.0),
+                            ("Weight 1".to_string(), -50.0)
+                        ],
+                    ),
+                    (
+                        &KernParticipant::Group("public.kern1.brackets".into()),
+                        &KernParticipant::Glyph("exclam".into()),
+                        vec![("Weight 0".to_string(), -165.0),],
+                    ),
+                ],
+            ),
+        );
+    }
+
+    #[test]
+    fn kerning_from_glyphs() {
+        assert_simple_kerning("glyphs3/WghtVar.glyphs");
+    }
+
+    #[test]
+    fn kerning_from_ufo() {
+        assert_simple_kerning("designspace_from_glyphs/WghtVar.designspace");
+    }
 }
diff --git a/fontir/src/ir.rs b/fontir/src/ir.rs
index f85bfba4a..002e21787 100644
--- a/fontir/src/ir.rs
+++ b/fontir/src/ir.rs
@@ -123,10 +123,10 @@ pub struct Kerning {
 /// Concretely, a glyph or a group of glyphs.
 ///
 /// <https://unifiedfontobject.org/versions/ufo3/kerning.plist/#kerning-pair-types>
-#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub enum KernParticipant {
     Glyph(GlyphName),
-    GroupName(GroupName),
+    Group(GroupName),
 }
 
 impl StaticMetadata {
diff --git a/glyphs2fontir/src/source.rs b/glyphs2fontir/src/source.rs
index 98b457a9a..bb6893bfa 100644
--- a/glyphs2fontir/src/source.rs
+++ b/glyphs2fontir/src/source.rs
@@ -509,7 +509,7 @@ fn kern_participant(
         );
         let group = GroupName::from(&group_name);
         if groups.contains_key(&group) {
-            Some(KernParticipant::GroupName(group))
+            Some(KernParticipant::Group(group))
         } else {
             warn!("Invalid kern side: {raw_side}, no group {group_name}");
             None
diff --git a/resources/testdata/designspace_from_glyphs/README.md b/resources/testdata/designspace_from_glyphs/README.md
new file mode 100644
index 000000000..1a86d1028
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/README.md
@@ -0,0 +1,6 @@
+Created by converting .glyphs files using fontmake, e.g.:
+
+```shell
+$ fontmake -o=ufo resources/testdata/glyphs3/WghtVar.glyphs
+$ mv master_ufo/* resources/testdata/designspace_from_glyphs/
+```
\ No newline at end of file
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/fontinfo.plist b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/fontinfo.plist
new file mode 100644
index 000000000..3ad1eda79
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/fontinfo.plist
@@ -0,0 +1,53 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>ascender</key>
+    <integer>800</integer>
+    <key>capHeight</key>
+    <integer>700</integer>
+    <key>copyright</key>
+    <string>Copy!</string>
+    <key>descender</key>
+    <integer>-200</integer>
+    <key>familyName</key>
+    <string>WghtVar</string>
+    <key>italicAngle</key>
+    <integer>0</integer>
+    <key>openTypeHeadCreated</key>
+    <string>2022/12/01 04:52:20</string>
+    <key>openTypeNameDescription</key>
+    <string>The greatest weight var</string>
+    <key>openTypeNameLicenseURL</key>
+    <string>https://example.com/my/font/license</string>
+    <key>openTypeNameVersion</key>
+    <string>New Value</string>
+    <key>openTypeOS2Selection</key>
+    <array>
+      <integer>7</integer>
+      <integer>8</integer>
+    </array>
+    <key>openTypeOS2Type</key>
+    <array>
+      <integer>3</integer>
+    </array>
+    <key>postscriptUnderlinePosition</key>
+    <integer>-100</integer>
+    <key>postscriptUnderlineThickness</key>
+    <integer>50</integer>
+    <key>styleMapFamilyName</key>
+    <string>WghtVar</string>
+    <key>styleMapStyleName</key>
+    <string>bold</string>
+    <key>styleName</key>
+    <string>Bold</string>
+    <key>unitsPerEm</key>
+    <integer>1000</integer>
+    <key>versionMajor</key>
+    <integer>42</integer>
+    <key>versionMinor</key>
+    <integer>42</integer>
+    <key>xHeight</key>
+    <integer>500</integer>
+  </dict>
+</plist>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/bracketleft.glif b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/bracketleft.glif
new file mode 100644
index 000000000..58d3becdd
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/bracketleft.glif
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<glyph name="bracketleft" format="2">
+  <advance width="600"/>
+  <unicode hex="005B"/>
+  <outline>
+    <contour>
+      <point x="454" y="629" type="line"/>
+      <point x="324" y="629" type="line"/>
+      <point x="324" y="58" type="line"/>
+      <point x="454" y="58" type="line"/>
+      <point x="454" y="-17" type="line"/>
+      <point x="243" y="-17" type="line"/>
+      <point x="243" y="704" type="line"/>
+      <point x="454" y="704" type="line"/>
+    </contour>
+  </outline>
+</glyph>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/bracketright.glif b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/bracketright.glif
new file mode 100644
index 000000000..4bd39ccd6
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/bracketright.glif
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<glyph name="bracketright" format="2">
+  <advance width="600"/>
+  <unicode hex="005D"/>
+  <outline>
+    <contour>
+      <point x="243" y="629" type="line"/>
+      <point x="243" y="704" type="line"/>
+      <point x="454" y="704" type="line"/>
+      <point x="454" y="-17" type="line"/>
+      <point x="243" y="-17" type="line"/>
+      <point x="243" y="58" type="line"/>
+      <point x="373" y="58" type="line"/>
+      <point x="373" y="629" type="line"/>
+    </contour>
+  </outline>
+</glyph>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/contents.plist b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/contents.plist
new file mode 100644
index 000000000..47862ecda
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/contents.plist
@@ -0,0 +1,18 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>bracketleft</key>
+    <string>bracketleft.glif</string>
+    <key>bracketright</key>
+    <string>bracketright.glif</string>
+    <key>exclam</key>
+    <string>exclam.glif</string>
+    <key>hyphen</key>
+    <string>hyphen.glif</string>
+    <key>manual-component</key>
+    <string>manual-component.glif</string>
+    <key>space</key>
+    <string>space.glif</string>
+  </dict>
+</plist>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/exclam.glif b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/exclam.glif
new file mode 100644
index 000000000..c16771227
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/exclam.glif
@@ -0,0 +1,19 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<glyph name="exclam" format="2">
+  <advance width="600"/>
+  <unicode hex="0021"/>
+  <outline>
+    <contour>
+      <point x="228" y="174" type="line"/>
+      <point x="364" y="176" type="line"/>
+      <point x="434" y="605" type="line"/>
+      <point x="159" y="605" type="line"/>
+    </contour>
+    <contour>
+      <point x="228" y="-20" type="line"/>
+      <point x="364" y="-20" type="line"/>
+      <point x="364" y="94" type="line"/>
+      <point x="228" y="94" type="line"/>
+    </contour>
+  </outline>
+</glyph>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/hyphen.glif b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/hyphen.glif
new file mode 100644
index 000000000..4bc2c7341
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/hyphen.glif
@@ -0,0 +1,13 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<glyph name="hyphen" format="2">
+  <advance width="600"/>
+  <unicode hex="002D"/>
+  <outline>
+    <contour>
+      <point x="92" y="356" type="line"/>
+      <point x="92" y="224" type="line"/>
+      <point x="508" y="224" type="line"/>
+      <point x="508" y="356" type="line"/>
+    </contour>
+  </outline>
+</glyph>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/manual-component.glif b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/manual-component.glif
new file mode 100644
index 000000000..cd1d614cb
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/manual-component.glif
@@ -0,0 +1,9 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<glyph name="manual-component" format="2">
+  <advance width="600"/>
+  <unicode hex="003D"/>
+  <outline>
+    <component base="hyphen" xScale="1.15" yScale="1.25" xOffset="10" yOffset="100"/>
+    <component base="hyphen"/>
+  </outline>
+</glyph>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/space.glif b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/space.glif
new file mode 100644
index 000000000..983348125
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/glyphs/space.glif
@@ -0,0 +1,7 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<glyph name="space" format="2">
+  <advance width="600"/>
+  <unicode hex="0020"/>
+  <outline>
+  </outline>
+</glyph>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/groups.plist b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/groups.plist
new file mode 100644
index 000000000..15368f4da
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/groups.plist
@@ -0,0 +1,16 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>public.kern1.brackets</key>
+    <array>
+      <string>bracketleft</string>
+      <string>bracketright</string>
+    </array>
+    <key>public.kern2.brackets</key>
+    <array>
+      <string>bracketleft</string>
+      <string>bracketright</string>
+    </array>
+  </dict>
+</plist>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/kerning.plist b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/kerning.plist
new file mode 100644
index 000000000..c49f61f57
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/kerning.plist
@@ -0,0 +1,21 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>bracketleft</key>
+    <dict>
+      <key>bracketright</key>
+      <integer>-150</integer>
+    </dict>
+    <key>exclam</key>
+    <dict>
+      <key>exclam</key>
+      <integer>-100</integer>
+    </dict>
+    <key>hyphen</key>
+    <dict>
+      <key>hyphen</key>
+      <integer>-50</integer>
+    </dict>
+  </dict>
+</plist>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/layercontents.plist b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/layercontents.plist
new file mode 100644
index 000000000..b9c1a4f27
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/layercontents.plist
@@ -0,0 +1,10 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <array>
+    <array>
+      <string>public.default</string>
+      <string>glyphs</string>
+    </array>
+  </array>
+</plist>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/lib.plist b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/lib.plist
new file mode 100644
index 000000000..5390b2cd8
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/lib.plist
@@ -0,0 +1,55 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>com.github.googlei18n.ufo2ft.filters</key>
+    <array>
+      <dict>
+        <key>name</key>
+        <string>eraseOpenCorners</string>
+        <key>namespace</key>
+        <string>glyphsLib.filters</string>
+        <key>pre</key>
+        <true/>
+      </dict>
+    </array>
+    <key>com.schriftgestaltung.customParameter.GSFont.disablesAutomaticAlignment</key>
+    <false/>
+    <key>com.schriftgestaltung.customParameter.GSFont.useNiceNames</key>
+    <integer>1</integer>
+    <key>com.schriftgestaltung.customParameter.GSFontMaster.customValue</key>
+    <integer>0</integer>
+    <key>com.schriftgestaltung.customParameter.GSFontMaster.customValue1</key>
+    <integer>0</integer>
+    <key>com.schriftgestaltung.customParameter.GSFontMaster.customValue2</key>
+    <integer>0</integer>
+    <key>com.schriftgestaltung.customParameter.GSFontMaster.customValue3</key>
+    <integer>0</integer>
+    <key>com.schriftgestaltung.customParameter.GSFontMaster.iconName</key>
+    <string>Bold</string>
+    <key>com.schriftgestaltung.customParameter.GSFontMaster.weightValue</key>
+    <integer>700</integer>
+    <key>com.schriftgestaltung.customParameter.GSFontMaster.widthValue</key>
+    <integer>100</integer>
+    <key>com.schriftgestaltung.fontMasterOrder</key>
+    <integer>1</integer>
+    <key>com.schriftgestaltung.weightValue</key>
+    <integer>700</integer>
+    <key>com.schriftgestaltung.widthValue</key>
+    <integer>100</integer>
+    <key>public.glyphOrder</key>
+    <array>
+      <string>space</string>
+      <string>exclam</string>
+      <string>hyphen</string>
+      <string>bracketleft</string>
+      <string>bracketright</string>
+      <string>manual-component</string>
+    </array>
+    <key>public.postscriptNames</key>
+    <dict>
+      <key>manual-component</key>
+      <string>manualcomponent</string>
+    </dict>
+  </dict>
+</plist>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/metainfo.plist b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/metainfo.plist
new file mode 100644
index 000000000..7b8b34ac6
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Bold.ufo/metainfo.plist
@@ -0,0 +1,10 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>creator</key>
+    <string>com.github.fonttools.ufoLib</string>
+    <key>formatVersion</key>
+    <integer>3</integer>
+  </dict>
+</plist>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/fontinfo.plist b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/fontinfo.plist
new file mode 100644
index 000000000..6fc0f394c
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/fontinfo.plist
@@ -0,0 +1,65 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>ascender</key>
+    <integer>737</integer>
+    <key>capHeight</key>
+    <integer>702</integer>
+    <key>copyright</key>
+    <string>Copy!</string>
+    <key>descender</key>
+    <integer>-42</integer>
+    <key>familyName</key>
+    <string>WghtVar</string>
+    <key>italicAngle</key>
+    <integer>0</integer>
+    <key>openTypeHeadCreated</key>
+    <string>2022/12/01 04:52:20</string>
+    <key>openTypeNameDescription</key>
+    <string>The greatest weight var</string>
+    <key>openTypeNameLicenseURL</key>
+    <string>https://example.com/my/font/license</string>
+    <key>openTypeNameVersion</key>
+    <string>New Value</string>
+    <key>openTypeOS2Selection</key>
+    <array>
+      <integer>7</integer>
+      <integer>8</integer>
+    </array>
+    <key>openTypeOS2Type</key>
+    <array>
+      <integer>3</integer>
+    </array>
+    <key>postscriptBlueValues</key>
+    <array>
+      <integer>-16</integer>
+      <integer>0</integer>
+      <integer>737</integer>
+      <integer>753</integer>
+    </array>
+    <key>postscriptOtherBlues</key>
+    <array>
+      <integer>-58</integer>
+      <integer>-42</integer>
+    </array>
+    <key>postscriptUnderlinePosition</key>
+    <integer>-100</integer>
+    <key>postscriptUnderlineThickness</key>
+    <integer>50</integer>
+    <key>styleMapFamilyName</key>
+    <string>WghtVar</string>
+    <key>styleMapStyleName</key>
+    <string>regular</string>
+    <key>styleName</key>
+    <string>Regular</string>
+    <key>unitsPerEm</key>
+    <integer>1000</integer>
+    <key>versionMajor</key>
+    <integer>42</integer>
+    <key>versionMinor</key>
+    <integer>42</integer>
+    <key>xHeight</key>
+    <integer>501</integer>
+  </dict>
+</plist>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/bracketleft.glif b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/bracketleft.glif
new file mode 100644
index 000000000..b6bf45046
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/bracketleft.glif
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<glyph name="bracketleft" format="2">
+  <advance width="600"/>
+  <unicode hex="005B"/>
+  <outline>
+    <contour>
+      <point x="454" y="637" type="line"/>
+      <point x="324" y="637" type="line"/>
+      <point x="324" y="51" type="line"/>
+      <point x="454" y="51" type="line"/>
+      <point x="454" y="-10" type="line"/>
+      <point x="259" y="-10" type="line"/>
+      <point x="259" y="696" type="line"/>
+      <point x="454" y="696" type="line"/>
+    </contour>
+  </outline>
+</glyph>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/bracketright.glif b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/bracketright.glif
new file mode 100644
index 000000000..6431af611
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/bracketright.glif
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<glyph name="bracketright" format="2">
+  <advance width="600"/>
+  <unicode hex="005D"/>
+  <outline>
+    <contour>
+      <point x="259" y="637" type="line"/>
+      <point x="259" y="696" type="line"/>
+      <point x="454" y="696" type="line"/>
+      <point x="454" y="-10" type="line"/>
+      <point x="259" y="-10" type="line"/>
+      <point x="259" y="51" type="line"/>
+      <point x="389" y="51" type="line"/>
+      <point x="389" y="637" type="line"/>
+    </contour>
+  </outline>
+</glyph>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/contents.plist b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/contents.plist
new file mode 100644
index 000000000..47862ecda
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/contents.plist
@@ -0,0 +1,18 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>bracketleft</key>
+    <string>bracketleft.glif</string>
+    <key>bracketright</key>
+    <string>bracketright.glif</string>
+    <key>exclam</key>
+    <string>exclam.glif</string>
+    <key>hyphen</key>
+    <string>hyphen.glif</string>
+    <key>manual-component</key>
+    <string>manual-component.glif</string>
+    <key>space</key>
+    <string>space.glif</string>
+  </dict>
+</plist>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/exclam.glif b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/exclam.glif
new file mode 100644
index 000000000..5bc6d8c77
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/exclam.glif
@@ -0,0 +1,19 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<glyph name="exclam" format="2">
+  <advance width="600"/>
+  <unicode hex="0021"/>
+  <outline>
+    <contour>
+      <point x="238" y="182" type="line"/>
+      <point x="354" y="183" type="line"/>
+      <point x="414" y="585" type="line"/>
+      <point x="178" y="585" type="line"/>
+    </contour>
+    <contour>
+      <point x="238" y="0" type="line"/>
+      <point x="354" y="0" type="line"/>
+      <point x="354" y="107" type="line"/>
+      <point x="238" y="107" type="line"/>
+    </contour>
+  </outline>
+</glyph>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/hyphen.glif b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/hyphen.glif
new file mode 100644
index 000000000..8b2d57e97
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/hyphen.glif
@@ -0,0 +1,13 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<glyph name="hyphen" format="2">
+  <advance width="600"/>
+  <unicode hex="002D"/>
+  <outline>
+    <contour>
+      <point x="131" y="330" type="line"/>
+      <point x="131" y="250" type="line"/>
+      <point x="470" y="250" type="line"/>
+      <point x="470" y="330" type="line"/>
+    </contour>
+  </outline>
+</glyph>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/manual-component.glif b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/manual-component.glif
new file mode 100644
index 000000000..1da63bcd3
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/manual-component.glif
@@ -0,0 +1,9 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<glyph name="manual-component" format="2">
+  <advance width="600"/>
+  <unicode hex="003D"/>
+  <outline>
+    <component base="hyphen" yOffset="100"/>
+    <component base="hyphen"/>
+  </outline>
+</glyph>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/space.glif b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/space.glif
new file mode 100644
index 000000000..c05cd73f7
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/glyphs/space.glif
@@ -0,0 +1,7 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<glyph name="space" format="2">
+  <advance width="200"/>
+  <unicode hex="0020"/>
+  <outline>
+  </outline>
+</glyph>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/groups.plist b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/groups.plist
new file mode 100644
index 000000000..15368f4da
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/groups.plist
@@ -0,0 +1,16 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>public.kern1.brackets</key>
+    <array>
+      <string>bracketleft</string>
+      <string>bracketright</string>
+    </array>
+    <key>public.kern2.brackets</key>
+    <array>
+      <string>bracketleft</string>
+      <string>bracketright</string>
+    </array>
+  </dict>
+</plist>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/kerning.plist b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/kerning.plist
new file mode 100644
index 000000000..716f79663
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/kerning.plist
@@ -0,0 +1,30 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>bracketleft</key>
+    <dict>
+      <key>bracketright</key>
+      <integer>-300</integer>
+    </dict>
+    <key>exclam</key>
+    <dict>
+      <key>exclam</key>
+      <integer>-360</integer>
+      <key>hyphen</key>
+      <integer>20</integer>
+      <key>public.kern2.brackets</key>
+      <integer>-160</integer>
+    </dict>
+    <key>hyphen</key>
+    <dict>
+      <key>hyphen</key>
+      <integer>-150</integer>
+    </dict>
+    <key>public.kern1.brackets</key>
+    <dict>
+      <key>exclam</key>
+      <integer>-165</integer>
+    </dict>
+  </dict>
+</plist>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/layercontents.plist b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/layercontents.plist
new file mode 100644
index 000000000..b9c1a4f27
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/layercontents.plist
@@ -0,0 +1,10 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <array>
+    <array>
+      <string>public.default</string>
+      <string>glyphs</string>
+    </array>
+  </array>
+</plist>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/lib.plist b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/lib.plist
new file mode 100644
index 000000000..f6d8314a3
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/lib.plist
@@ -0,0 +1,55 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>com.github.googlei18n.ufo2ft.filters</key>
+    <array>
+      <dict>
+        <key>name</key>
+        <string>eraseOpenCorners</string>
+        <key>namespace</key>
+        <string>glyphsLib.filters</string>
+        <key>pre</key>
+        <true/>
+      </dict>
+    </array>
+    <key>com.schriftgestaltung.customParameter.GSFont.disablesAutomaticAlignment</key>
+    <false/>
+    <key>com.schriftgestaltung.customParameter.GSFont.useNiceNames</key>
+    <integer>1</integer>
+    <key>com.schriftgestaltung.customParameter.GSFontMaster.customValue</key>
+    <integer>0</integer>
+    <key>com.schriftgestaltung.customParameter.GSFontMaster.customValue1</key>
+    <integer>0</integer>
+    <key>com.schriftgestaltung.customParameter.GSFontMaster.customValue2</key>
+    <integer>0</integer>
+    <key>com.schriftgestaltung.customParameter.GSFontMaster.customValue3</key>
+    <integer>0</integer>
+    <key>com.schriftgestaltung.customParameter.GSFontMaster.iconName</key>
+    <string></string>
+    <key>com.schriftgestaltung.customParameter.GSFontMaster.weightValue</key>
+    <integer>400</integer>
+    <key>com.schriftgestaltung.customParameter.GSFontMaster.widthValue</key>
+    <integer>100</integer>
+    <key>com.schriftgestaltung.fontMasterOrder</key>
+    <integer>0</integer>
+    <key>com.schriftgestaltung.weightValue</key>
+    <integer>400</integer>
+    <key>com.schriftgestaltung.widthValue</key>
+    <integer>100</integer>
+    <key>public.glyphOrder</key>
+    <array>
+      <string>space</string>
+      <string>exclam</string>
+      <string>hyphen</string>
+      <string>bracketleft</string>
+      <string>bracketright</string>
+      <string>manual-component</string>
+    </array>
+    <key>public.postscriptNames</key>
+    <dict>
+      <key>manual-component</key>
+      <string>manualcomponent</string>
+    </dict>
+  </dict>
+</plist>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/metainfo.plist b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/metainfo.plist
new file mode 100644
index 000000000..7b8b34ac6
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar-Regular.ufo/metainfo.plist
@@ -0,0 +1,10 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>creator</key>
+    <string>com.github.fonttools.ufoLib</string>
+    <key>formatVersion</key>
+    <integer>3</integer>
+  </dict>
+</plist>
diff --git a/resources/testdata/designspace_from_glyphs/WghtVar.designspace b/resources/testdata/designspace_from_glyphs/WghtVar.designspace
new file mode 100644
index 000000000..b955de11c
--- /dev/null
+++ b/resources/testdata/designspace_from_glyphs/WghtVar.designspace
@@ -0,0 +1,34 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<designspace format="5.0">
+  <axes>
+    <axis tag="wght" name="Weight" minimum="400" maximum="700" default="400"/>
+  </axes>
+  <sources>
+    <source filename="WghtVar-Regular.ufo" name="WghtVar Regular" familyname="WghtVar" stylename="Regular">
+      <lib copy="1"/>
+      <groups copy="1"/>
+      <features copy="1"/>
+      <info copy="1"/>
+      <location>
+        <dimension name="Weight" xvalue="400"/>
+      </location>
+    </source>
+    <source filename="WghtVar-Bold.ufo" name="WghtVar Bold" familyname="WghtVar" stylename="Bold">
+      <location>
+        <dimension name="Weight" xvalue="700"/>
+      </location>
+    </source>
+  </sources>
+  <instances>
+    <instance name="WghtVar Regular" familyname="WghtVar" stylename="Regular" filename="instance_ufos/WghtVar-Regular.ufo" stylemapfamilyname="Wght Var" stylemapstylename="regular">
+      <location>
+        <dimension name="Weight" xvalue="400"/>
+      </location>
+    </instance>
+    <instance name="WghtVar Bold" familyname="WghtVar" stylename="Bold" filename="instance_ufos/WghtVar-Bold.ufo" stylemapfamilyname="Wght Var" stylemapstylename="bold">
+      <location>
+        <dimension name="Weight" xvalue="700"/>
+      </location>      
+    </instance>
+  </instances>
+</designspace>
diff --git a/ufo2fontir/src/source.rs b/ufo2fontir/src/source.rs
index 4fa608296..2adad62c6 100644
--- a/ufo2fontir/src/source.rs
+++ b/ufo2fontir/src/source.rs
@@ -904,7 +904,7 @@ impl Work<Context, WorkError> for KerningWork {
             let resolve_participant = |name: &norad::Name| {
                 let group_name = GroupName::from(name.as_str());
                 if kerning.groups.contains_key(&group_name) {
-                    return Some(KernParticipant::GroupName(group_name));
+                    return Some(KernParticipant::Group(group_name));
                 }
                 let glyph_name = GlyphName::from(name.as_str());
                 if static_metadata.glyph_order.contains(&glyph_name) {