Old English hwæþer

← Proto-Germanic *hwaþeraz (inherited)

← Old High German wedar (cognate)

← Old Norse hvaðarr (cognate)

→ English whether (inherited)

→ English nauther (mention)

→ Old English swæþer (mention)

→ Old English hwæþre (suffix)

→ Ancient Greek πότερος (cognate)

→ Sanskrit कतर (cognate)