Where does “Sacha” come from?

Sacha (English) comes from French Sacha, from Russian Са́ша, from Russian Алекса́ндр, from Old East Slavic Олександръ, from Ancient Greek Ἀλέξανδρος, from Ancient Greek ἀλέξω, from Ancient Greek ἀνδρός, from Ancient Greek ἀνήρ — man.

Ancestry of “Sacha”, step by step

Sacha traces back through two separate lines of ancestry.

via French Sacha

StepLanguageWordMeaning
1FrenchSacha
2RussianСа́ша
3RussianАлекса́ндрAlexander, male
4Old East SlavicОлександръ
5Ancient GreekἈλέξανδροςAlexander
6Ancient Greekἀλέξωto keep off, turn aside; to guard, protect,...
7Ancient Greekἀνδρόςgenitive singular of ἀνήρ; man; of man
8Ancient Greekἀνήρman; husband; human being, as opposed to a god
9Proto-Hellenic*anḗrman

via Polish Sacha

StepLanguageWordMeaning
1PolishSacha
2PolishAleksander
3LatinAlexander
Every word from Proto-Hellenic *anḗrEvery word from Ancient Greek ἀνήρEvery word from Ancient Greek ἀνδρός