Proto-Germanic *ahtōutehun

→ English eighteen (inherited)

→ Afrikaans agtien (inherited)

→ Old English eahtatiene (inherited)

→ Cimbrian achtzane (inherited)

→ Danish atten (derived)

→ German achtzehn (inherited)

→ Middle English eiȝtetene (inherited)

→ Faroese átjan (derived)

→ Westrobothnian atan (inherited)

→ Old Swedish atertan (derived)

→ Icelandic átján (derived)

→ Norwegian Bokmål a (derived)

→ Norwegian Bokmål atten (derived)

→ Dutch achttien (inherited)

→ Old Norse átján (inherited)

→ Old Norse áttján (inherited)

→ Old Saxon ahtotein (inherited)

→ Elfdalian aðertǫ (inherited)

→ Elfdalian åttjǫ (derived)

→ Swedish arton (derived)

→ Swedish aderton (inherited)

→ Vilamovian aochcao (inherited)

→ Yiddish אַכצן (derived)

→ Yola ayghteen (inherited)