St. Nicholas of Myra
It's his feast day, so here's a link to information on the real deal who has been slowly distorted into Santa Claus. (In the homily today, Fr. Drew noted that it's a bit ironic that, given the current image of Santa with his bag of toys, our Gospel today for the feast of St. Nicholas included the verse, "Carry no money bag, no sack, no sandals; and greet no one along the way." )