Old Irish cúan

← Proto-Celtic *koupn (derived)

← Irish cú (mention)

← Proto-Germanic *haupaz (cognate)

← Proto-Indo-European *kapno- (inherited(sga/mga))

← Proto-Indo-European *keh₂wp-o- (derived)

← Proto-Slavic *kupъ (cognate)

→ English haven (cognate)

→ Old Church Slavonic коупъ (cognate)

→ Irish cuain (inherited)

→ Scottish Gaelic cuan (inherited)

→ Scottish Gaelic cuain (inherited)

→ Middle Irish cúan (inherited)

→ Albanian kap (cognate)