Russian березозол

← Bulgarian брезен (cognate)

← Czech březen (cognate)

← Polish brzezień (cognate)

← Russian берёза (link)

← Proto-Slavic *berzьnь (inherited)

← Proto-Slavic *berza (mention)

← Proto-Slavic *-ьnъ (mention)

← Ukrainian березень (cognate)

→ Ukrainian березень (cognate)