Proto-Indo-European *wos

→ Breton c'hwi (inherited)

→ Central Kurdish ئێوە (inherited)

→ Czech váš (inherited)

→ Welsh why (inherited(cy/kw))

→ Welsh chi (inherited)

→ Welsh chwi (derived)

→ Welsh hwi (inherited(cy/kw))

→ Lower Sorbian wy (inherited)

→ Irish sibh (derived)

→ Upper Sorbian wy (inherited)

→ Polish wy (inherited)

→ Sanskrit वस् (inherited)

→ Old Irish sib (derived)

→ Old Irish síi (inherited)

→ Slovak váš (inherited)