That's interesting. Sarah was the wife of Abraham who is considered the father of the Jewish, Christian and Moslem faiths. So I would think it's most certainly a good Jewish name. I'm not so sure about it being a Moslem name since it was Sarah who sent Ishmaiel and his mother into the desert. And since Moslems consider Ishmaiel and not Isaac to be Abraham's heir, I would think they don't like Sarah too much. Maybe Moslems believe that Ishmael was the son of Sarah and not Hagar? I don't know
Perhaps somebody here knows.