←
Old English āc (cognate)←
Proto-Germanic *aiks (inherited)←
Proto-West Germanic *aik (inherited)←
Proto-Indo-European *h₂eyǵ- (root)←
Proto-Indo-European *h₂eyǵ- (derived)←
Old Norse eik (cognate)←
Old Frisian ēk (cognate)→
Cimbrian aicha (inherited)→
German Eiche (inherited)→
Central Franconian Eech (inherited)→
Luxembourgish Eech (inherited)→
Albanian enjë (cognate)→
Vilamovian aach (derived)