Proto-Indo-European *prH-uo-

→ Czech prvý (derived)

→ Old Church Slavonic прьвъ (inherited)

→ Macedonian прв (derived)

→ Polish pierwszy (derived)

→ Istro-Romanian prvi (derived)

→ Serbo-Croatian prvi (derived)

→ Serbo-Croatian први (mention)

→ Slovak prvý (derived)

→ Slovene prvi (derived)