Yes, Josephine is a saint's name. Saint Josephine Bakhita was a Sudanese-born former slave who became a Canossian nun and is now recognized as a saint by the Catholic Church. She is known for her incredible journey from slavery to freedom and her unwavering faith in God. Saint Josephine Bakhita's feast day is celebrated on February 8th.
There are a number of saints named Josephine so you need to be more specific.
Josephine Sable's birth name is Josephine Battles.
Josephine Taylor's birth name is Motz, Josephine.
Josephine DeKarr's birth name is Josephine McLaughlin.
Josephine Edwards's birth name is Josephine Pearson.
Josephine Norman's birth name is Arrich, Josephine.
Josephine Zeitlin's birth name is Josephine Shady.
Josephine Lovett's birth name is Josephine Shaw.
Josephine Stuart's birth name is Celia Josephine Smith.
Josephine Bentham's birth name is Josephine Alena Bentham.
Josephine Barstow's birth name is Josephine Clare Barstow.
Josephine Bauer's birth name is Victoria Josephine Bauer.