Image via A Victorian Christmas
You may be under the impression that this is a picture of Santa Claus, but if the verse printed on the card is to be believed, it's actually King Christmas. Who, you may ask, is King Christmas? Beats me, but he sure looks a lot like Santa Claus.
An alternate theory is that the person pictured on the card is Aberforth Dumbledore, who was was prosecuted for practicing inappropriate charms on a goat.