Welsh celyn

← Breton kelenn (cognate)

← Proto-Celtic *kolinnos (inherited)

← English holly (cognate)

← Proto-Indo-European *ḱel- (root)

← Proto-Indo-European *ḱol- (inherited)

← Proto-Indo-European *ḱel- (mention)

← Cornish kelyn (cognate)

← Old Irish cuilenn (cognate)

→ English holly (cognate)

→ Breton kelenn (cognate)

→ Welsh celynnen (affix)

→ Welsh celynna (affix)

→ Irish cuileann (cognate)

→ Scottish Gaelic cuileann (cognate)

→ Manx cullyn (cognate)

→ Old Irish cuilenn (cognate)