As a boy's name this is a pet form of Jeremy or Gerald, or occasionally of Gerard and Jerome. As a girl's name it is a variant spelling of Gerry, and is sometimes bestowed as an independent given name, as in the case of the American model and actress Jerry Hall (b. 1956).
German: occupational name for a preparer or seller of parchment, from an agent derivative of Middle High German pergamente ‘parchment’ (so called from the ancient city of Pergamon in Asia Minor, where the technique of producing the material originated). Parchment was in general use well into the 15th century.