diff --git a/css/properties/font-family.json b/css/properties/font-family.json
index 442746d6b8fa1b..0653979820d9fd 100644
--- a/css/properties/font-family.json
+++ b/css/properties/font-family.json
@@ -87,42 +87,6 @@
             }
           }
         },
-        "fangsong": {
-          "__compat": {
-            "spec_url": "https://drafts.csswg.org/css-fonts-4/#valdef-font-family-generic-fangsong",
-            "tags": [
-              "web-features:font-family"
-            ],
-            "support": {
-              "chrome": {
-                "version_added": "1"
-              },
-              "chrome_android": "mirror",
-              "edge": {
-                "version_added": "12"
-              },
-              "firefox": {
-                "version_added": "1"
-              },
-              "firefox_android": "mirror",
-              "oculus": "mirror",
-              "opera": "mirror",
-              "opera_android": "mirror",
-              "safari": {
-                "version_added": "1"
-              },
-              "safari_ios": "mirror",
-              "samsunginternet_android": "mirror",
-              "webview_android": "mirror",
-              "webview_ios": "mirror"
-            },
-            "status": {
-              "experimental": false,
-              "standard_track": true,
-              "deprecated": false
-            }
-          }
-        },
         "fantasy": {
           "__compat": {
             "spec_url": "https://drafts.csswg.org/css-fonts-4/#valdef-font-family-fantasy",
@@ -159,78 +123,6 @@
             }
           }
         },
-        "kai": {
-          "__compat": {
-            "spec_url": "https://drafts.csswg.org/css-fonts-4/#valdef-font-family-generic-kai",
-            "tags": [
-              "web-features:font-family"
-            ],
-            "support": {
-              "chrome": {
-                "version_added": "1"
-              },
-              "chrome_android": "mirror",
-              "edge": {
-                "version_added": "12"
-              },
-              "firefox": {
-                "version_added": "1"
-              },
-              "firefox_android": "mirror",
-              "oculus": "mirror",
-              "opera": "mirror",
-              "opera_android": "mirror",
-              "safari": {
-                "version_added": "1"
-              },
-              "safari_ios": "mirror",
-              "samsunginternet_android": "mirror",
-              "webview_android": "mirror",
-              "webview_ios": "mirror"
-            },
-            "status": {
-              "experimental": false,
-              "standard_track": true,
-              "deprecated": false
-            }
-          }
-        },
-        "khmer-mul": {
-          "__compat": {
-            "spec_url": "https://drafts.csswg.org/css-fonts-4/#valdef-font-family-generic-khmer-mul",
-            "tags": [
-              "web-features:font-family"
-            ],
-            "support": {
-              "chrome": {
-                "version_added": "1"
-              },
-              "chrome_android": "mirror",
-              "edge": {
-                "version_added": "12"
-              },
-              "firefox": {
-                "version_added": "1"
-              },
-              "firefox_android": "mirror",
-              "oculus": "mirror",
-              "opera": "mirror",
-              "opera_android": "mirror",
-              "safari": {
-                "version_added": "1"
-              },
-              "safari_ios": "mirror",
-              "samsunginternet_android": "mirror",
-              "webview_android": "mirror",
-              "webview_ios": "mirror"
-            },
-            "status": {
-              "experimental": false,
-              "standard_track": true,
-              "deprecated": false
-            }
-          }
-        },
         "math": {
           "__compat": {
             "tags": [
@@ -300,42 +192,6 @@
             }
           }
         },
-        "nastaliq": {
-          "__compat": {
-            "spec_url": "https://drafts.csswg.org/css-fonts-4/#valdef-font-family-generic-nastaliq",
-            "tags": [
-              "web-features:font-family"
-            ],
-            "support": {
-              "chrome": {
-                "version_added": "1"
-              },
-              "chrome_android": "mirror",
-              "edge": {
-                "version_added": "12"
-              },
-              "firefox": {
-                "version_added": "1"
-              },
-              "firefox_android": "mirror",
-              "oculus": "mirror",
-              "opera": "mirror",
-              "opera_android": "mirror",
-              "safari": {
-                "version_added": "1"
-              },
-              "safari_ios": "mirror",
-              "samsunginternet_android": "mirror",
-              "webview_android": "mirror",
-              "webview_ios": "mirror"
-            },
-            "status": {
-              "experimental": false,
-              "standard_track": true,
-              "deprecated": false
-            }
-          }
-        },
         "sans-serif": {
           "__compat": {
             "spec_url": "https://drafts.csswg.org/css-fonts-4/#valdef-font-family-sans-serif",