I've been searching the Net for Moocks.A rabbi Moock married my grandparents, Sophie Levy and Isidor Belkowsky in 1896, in Mulhouse, Alsace. This Rabbi is mentioned in a book by Vicki Caron "Between France and Germany." cIn 1882, he solicited the opinion of the Grand Rabbi of France on the question of introducingamixed" choir into his community.Moock himself was oppposed to this trend as being repugnant to Alsatian Jewish tradition. He understood that such choirs were the fashion in German Jewish communities, but he disapproved of them. I suppose, since there appears to be so many non Jewish Moocks and Mooks and even Mochs, that except for Dermon's Moocks, Rabbi Moock's parents took the name from the town on the border between the Netherlands and Germany, when Napoleon decreed that Jews take on surnames.