Proto-Slavic *rojь

→ Czech roj (inherited)

→ Czech rojník (derived)

→ Lower Sorbian roj (inherited)

→ Hungarian raj (derived)

→ Polish rój (inherited)

→ Romanian roi (derived)

→ Russian рой (inherited)

→ Serbo-Croatian roj (inherited)

→ Serbo-Croatian рој (inherited)

→ Slovak roj (inherited)

→ Ukrainian рій (inherited)