Where does “Вадим” come from?

Вадим (Russian) comes from Old East Slavic Вадимъ, from Proto-Slavic vaditi, from Proto-Indo-European (s)wod-, from Proto-Indo-European swé — self.

Ancestry of “Вадим”, step by step

StepLanguageWordMeaning
1Old East SlavicВадимъ—
2Proto-Slavicvaditito argue; to scold, to brawl; to take out
3Proto-Indo-European(s)wod-—
4Proto-Indo-Europeanswéself
Every word from Proto-Indo-European swé →Every word from Proto-Indo-European (s)wod- →Every word from Proto-Slavic vaditi →