Stephanie has had more staying power than most female forms of a boy's name, managing to be feminine without being frilly, and having had a long run of popularity. In the 1970s and 1980s, Stephanie was Top 20 name, but has gradually faded to its present 208th position.
The variantly spelled Stephenie Meyer gained fame as the author of the Twilight franchise, the tennis player Steffi Graf was born Stefanie, so there are obviously lots of variations on this name. Singer Stevie Nicks has the conventional spelling of Stephanie on her birth certificate. Stephanie Plum is the protagonist of the eponymous books by Janet Evanovich.