Sasha, largely male in Russia--and also spelled Sascha and Sacha--is an energetic name that has really taken off for girls here, chosen by Jerry Seinfeld (using the alternate Sascha spelling) and other celebs. The Barack Obamas use it as the nickname for their younger daughter, whose proper name is Natasha. But in line with a trend toward softer-sounding boys' names like Asher and Joshua and thanks to Borat star Sacha Baron Cohen, Sasha also still has life as a boys' name too--it's popular in France for boys and girls almost equally.
Another notable female bearer is 2006 Olympic silver medalist skater Sasha Cohen; Sasha Alexander, on the TV show Rizzoli & Isles, was born Suzana. And Sasha Fierce is the name of Beyonce's alter ego.
Sasha, now Number 451, was as high as 147 in 1988.