An Etymological Dictionary of the German Language/Annotated/Ziemer
Ziemer, masculine, ‘buttock, hind-quarter' (of animals), ‘haunch (of venison),’ from the equivalent Middle High German zimere, feminine Bavarian dialectic forms such as Zem (Zen) and Zemsen indicate the Teutonic origin of the word; Teutonic base têmoz-, timiz-.