Where does “оди́нъ” come from?

оди́нъ (Old East Slavic) comes from Proto-Slavic edìnъ, from Proto-Balto-Slavic edīˀnas, from Proto-Balto-Slavic aiˀnas, from Proto-Indo-European óynos — one; single.

Ancestry of “оди́нъ”, step by step

оди́нъ traces back through two separate lines of ancestry.

via Proto-Slavic edìnъ

StepLanguageWordMeaning
1Proto-Slavicedìnъone
2Proto-Balto-Slavicedīˀnas
3Proto-Balto-Slavicaiˀnasone
4Proto-Indo-Europeanóynosone; single

via Proto-Slavic (j)edinъ

StepLanguageWordMeaning
1Proto-Slavic(j)edinъ

Words derived from “оди́нъ

Every word from Proto-Indo-European óynosEvery word from Proto-Balto-Slavic aiˀnasEvery word from Proto-Balto-Slavic edīˀnas