Was Anton Lavey of Jewish descent? If so, what side(s) of the family?
Wikipedia says that his paternal grandfather’s name was Leon Levy. His father must have changed it to LeVey. His paternal grandmother’s name was Emma Goldsmith. It’s a good guess that he was of half (at least) Jewish ancestry. There is no evidence that his mom was Jewish.
So, the answer to the OP is, “yes.”
ETA: Technically, of course, he wasn’t Jewish but he was of Jewish descent.