Sabrina, the bewitchingly radiant name of a legendary Celtic goddess, is best known as the heroine of the eponymous film, originally played by Audrey Hepburn, and later as a teenage TV witch; it would make a distinctive alternative to the ultrapopular Samantha. Similar names you might also want to consider include Sabina and Serena.
In Milton's poem "Comus," the river nymph is addressed as Sabrina Fair, which became the title of a 1953 play. In the original Charlie's Angels, Sabrina was played by Kate Jackson.
Sabrina debuted on the US popularity charts in 1953, and one year later, with the release of the Audrey Hepburn film, shot up 550 places. It reached the Top 100 in 1977 and hovered in and around the top 100 until the late 90's when its popularity began to decline. It's now at Number 370, its lowest spot on the popular names list since Dwight Eisenhower was president.