Proto-Slavic *bukъ

→ Bulgarian бук (inherited)

→ Czech buk (inherited)

→ Lower Sorbian buk (inherited)

→ Lithuanian bukas (derived)

→ Macedonian бука (inherited)

→ Macedonian бука (mention)

→ Polish buk (inherited)

→ Romanian Bucovina (derived)

→ Romanian Bucov (derived)

→ Romanian Bucova (derived)

→ Romanian Bucovăț (affix)