Proto-Indo-European *kʷóteros

→ Kashubian chtëren (inherited)

→ Lower Sorbian kótary (derived)

→ Ancient Greek πότερος (inherited)

→ Alemannic German weder (inherited)

→ Upper Sorbian kotryž (inherited)

→ Latin uter (derived)

→ Polish który (inherited)

→ Russian который (inherited)

→ Sanskrit कतर (inherited)

→ Slovak ktorý (inherited)