Sasha itself is a kind of a nickname. Unless you wanted to go with Sash?
Famous people named Sasha:
Daughter of former President Barack Obama, Natasha "Sasha" Obama; actresses Sasha Barrese, Sasha Reynolds, Sasha Ramos, and Sasha Pieterse; actors Sasha Mitchell and Sasha Roiz; author Sasha Alsberg.
The name of Beyonce's alter-ego is "Sasha Fierce."
Spirited S Names For Baby Girls, Solid S Names For Baby Boys, Terrific Two-Syllable Girl Names, Terrific Two-Syllable Boy Names, Totally Un-Scary Names Inspired By “The Walking Dead”, Unisex Names Perfect For Any Gender,