Ukrainian березень

← Bulgarian брезен (cognate)

← Czech březen (cognate)

← Polish brzezeń (cognate)

← Russian березозол (cognate)

← Proto-Slavic *berzьnь (inherited)

← Proto-Slavic *berza (mention)

← Proto-Slavic *-ьnъ (mention)

← Ukrainian бере́за (link)

→ Russian березозол (cognate)