Where does “а́вгуст” come from?

а́вгуст (Russian) comes from German august, from English August, from Middle English August, from Old English Agustus, from Latin Augustus, from Proto-Indo-European h₂ewg-, from Proto-Indo-European h₂weg-, from Proto-Indo-European h₂ug-.

Ancestry of “а́вгуст”, step by step

а́вгуст traces back through two separate lines of ancestry.

via German august

StepLanguageWordMeaning
1GermanaugustAugust (month)
2EnglishAugustThe eighth month of the Roman, Julian, and Gregorian calendars, following July and preceding September
3Middle EnglishAugust
4Old EnglishAgustus
5LatinAugustusvenerable
6Proto-Indo-Europeanh₂ewg-to increase, to enlarge
7Proto-Indo-Europeanh₂weg-to increase, to enlarge
8Proto-Indo-Europeanh₂ug-

via Old East Slavic авъгустъ

StepLanguageWordMeaning
1Old East SlavicавъгустъAugust
2Byzantine GreekΑὔγουστος

Words derived from “а́вгуст

Every word from Proto-Indo-European h₂ug-Every word from Proto-Indo-European h₂weg-Every word from Proto-Indo-European h₂ewg-