diff --git a/etc/nxml/0FE20-0FE2F.el b/etc/nxml/0FE20-0FE2F.el
new file mode 100644
index 00000000000..358dccd061e
--- /dev/null
+++ b/etc/nxml/0FE20-0FE2F.el
@@ -0,0 +1,8 @@
+(nxml-define-char-name-set 'combining-half-marks
+  '(("COMBINING LIGATURE LEFT HALF" #xFE20)
+    ("COMBINING LIGATURE RIGHT HALF" #xFE21)
+    ("COMBINING DOUBLE TILDE LEFT HALF" #xFE22)
+    ("COMBINING DOUBLE TILDE RIGHT HALF" #xFE23)
+    ))
+
+;; arch-tag: de291a34-737a-4bbb-8d97-94f878921d05