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).
North German: topographic name for someone who lived near a marsh, from an old dialect word stel ‘bog’, where the land was built up on mudflats (behind the dyke) for cattle grazing. The word later assumed the meaning ‘small farm’.