Proto-Germanic *þankōną

→ English thank (inherited)

→ Old English þancian (inherited)

→ Cimbrian dånkan (inherited)

→ Danish takke (derived)

→ German danken (derived)

→ Middle Dutch danken (inherited)

→ Faroese takka (inherited)

→ Old Swedish þakka (inherited)

→ Old High German dankon (inherited)

→ Hunsrik danke (inherited)

→ Hunsrik tanke (derived)

→ Icelandic þakka (inherited)

→ Luxembourgish danken (inherited)

→ Norwegian Bokmål takke (derived)

→ Dutch danken (inherited)

→ Old Norse þakka (inherited)

→ Old Dutch thancon (inherited)

→ Old Saxon thankon (inherited)

→ Scots thank (inherited)

→ Saterland Frisian tonkje (derived)

→ Swedish tacka (inherited)

→ Ukrainian дякувати (derived)

→ Ukrainian дяковати (derived(uk/orv))

→ Yiddish דאַנקען (inherited)