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 and Danish: 1. from a short form of a Germanic nickname that may be derived from Old High German grātag ‘greedy’. 2. from Middle Low German grese ‘horror’, ‘fear’, a nickname for someone who was feared in the community. 3. habitational name from Gress, a place in Mecklenburg.