Yes. It can be a female first name such as Jo-Anne. Or a shortened version for Josephine.
Joan Ciccone's birth name is Joan Gustafson.
Joan Blondell's birth name is Blondell, Rose Joan.
Yes, Joan is a name.
Joan Jett's birth name is Joan Marie Larkin.
Joan Marion's birth name is Joan Nicholls.
Joan Lora's birth name is Joan Paladini.
Joan Rydell's birth name is Joan Reddell.
Joan Samuels's birth name is Joan Samuels.
Joan Joseff's birth name is Joan Castle.
Joan Austen's birth name is Joan McBride.
Joan Darling's birth name is Kugell, Joan.