There are many different legends of Saint Patrick, but Catholic Online states that his parents, Calpurnius and Conchessa, were Romans, making Saint Patrick of Italian decent, although he was born in Kilpatrick, Scotland. The History Channel states that it is unknown if Patrick's parents were Romans or of Celtic decent.
Saint Patrick was taken captive by Irish raiders while he was in his teens. He was held as a slave for 6 years. After escaping captivity, he returned to Britain to begin studying Christianity. He later returned to Ireland and preached Christianity for 40 years. He died in Saul, Ireland, the town where he built his first church.