Proto-West Germanic *kaupōn

→ English cheap (mention)

→ Old English copian (derived)

→ Old English ceapian (inherited)

→ German kaufen (inherited)

→ Middle Dutch copen (inherited)

→ Old High German koufon (inherited)

→ Luxembourgish kafen (inherited)

→ Low German kopen (inherited)

→ Dutch kopen (inherited)

→ Old Dutch copon (inherited)

→ Old Frisian kapia (inherited)

→ Saterland Frisian koopje (inherited)

→ Yiddish קויפֿן (inherited)