Proto-Slavic *pъlkъ

→ Czech pluk (inherited)

→ Old Church Slavonic плъкъ (inherited)

→ German Pulk (derived)

→ Macedonian полк (inherited)

→ Polish pułk (mention)

→ Romanian pâlc (derived)

→ Serbo-Croatian puk (inherited)

→ Serbo-Croatian pukovnik (inherited)

→ Serbo-Croatian plk (inherited)

→ Serbo-Croatian пук (inherited)

→ Serbo-Croatian плк (inherited)

→ Serbo-Croatian пуковник (inherited)