"Jesus had been taken care of, but Santa Claus was not so easily forgotten. Tracing his roots to St. Nicholas of Myra, a fourth-century Greek Christian bishop from Turkey, Santa was both explicitly Christian and very definitely not Aryan. Even so, Santa was so beloved that not even the Nazis felt that they could wage a war against him. Instead, they changed his name. Nazis argued that the white-robed and gray-bearded figure who came to people’s houses and gave them gifts on Christmas Day was really the pagan god Odin. Christians had merely stolen him, but now he had been reclaimed"
https://www.fastcodesign.com/3024022/how-hitler-redesigned-christmas