Make sure you refer to this guide when naming glyphs: https://www.evertype.com/standards/csur/naming.html
@@ F2D60 Spacing Modifier Letters Extended-A F2D9F @@+ @ Historic and nonstandard Modifier Diacritics F2D69 MODIFIER LETTER MIDDLE MACRON F2D6A MODIFIER LETTER MIDDLE CIRCUMFLEX F2D6B MODIFIER LETTER MIDDLE CARON F2D6C MODIFIER LETTER MIDDLE INVERTED BREVE F2D6D MODIFIER LETTER LOW INVERTED BREVE
