Of Irish origin. Feminine form of the Irish name Sean, which in turn is an Irish form of John. It means “graced by God”. Other forms of the name are Seanna, Shawna, Seann, Sianna, Ioanna, Giovanna, Jane, Janis, Joan, Ivana, Juana, Joni, Johanna, etc. Famous bearers are Seana McKenna, Seana Kofoed, Seana Kerslake, Seana Gorlick.