Russian сентябрь

← Latin september (derived)

← Latin septem (mention)

← Old East Slavic сентѧбрь (inherited)

← Old East Slavic семтѧбрь (mention)

← Old East Slavic септѧбрь (mention)

← Old East Slavic септѧбръ (mention)

← Old East Slavic септѧмбрь (mention)

← Old East Slavic врѣсень (cognate)

← Old East Slavic рюѥнъ (mention)

← Old East Slavic рюинъ (mention)

← Russian седьмо́й (mention)

← Ukrainian ве́ресень (cognate)