Proto-Germanic *aiks

→ English oak (inherited)

→ Afrikaans eik (inherited)

→ Old English ac (inherited)

→ Cimbrian aicha (inherited)

→ Middle Dutch eike (inherited)

→ Faroese eik (derived)

→ Westrobothnian eik (inherited)

→ Central Franconian Eech (inherited)

→ Old High German eih (inherited)

→ Ancient Greek αἰγίλωψ (cognate)

→ Icelandic eik (derived)

→ Luxembourgish Eech (inherited)

→ Marshallese uuk (derived)

→ Norwegian Bokmål eik (inherited)

→ Norwegian Bokmål Egersund (inherited)

→ Dutch eik (inherited)

→ Norwegian Nynorsk eik (derived)

→ Old Norse eik (inherited)

→ Old Saxon ek (inherited)

→ Scots aik (inherited)

→ Saterland Frisian Eeke (derived)

→ Swedish ek (inherited)

→ Vilamovian aach (inherited)