Proto-Slavic *ujь

→ Bulgarian вуйчо (derived)

→ Czech ujec (inherited)

→ Kashubian wùja (inherited)

→ Lithuanian avynas (cognate)

→ Macedonian вујко (inherited)

→ Polish wuj (inherited)

→ Polabian vaujă (inherited)

→ Russian уй (inherited)

→ Serbo-Croatian ujak (inherited)

→ Serbo-Croatian ујак (inherited)

→ Slovak ujo (inherited)

→ Slovene ujec (inherited)