Usual medieval English form of the Greek name Theophania ‘Epiphany’, from theos ‘god’ + phainein ‘to appear’. This was once a relatively common name, given particularly to girls born on the feast of the Epiphany (6 January), and it gave rise to an English surname. As a given name, it fell into disuse until revived in the 20th century under the influence of the famous New York jewellers, Tiffany's, and the film, starring Audrey Hepburn, Breakfast at Tiffany's (1961). This is a very popular African-American name.
English (Devon), Dutch, and German: occupational name for a baker, from Anglo-Norman French pestour, pistour, Middle Dutch pester, pister ‘baker’ (Old French pestor, pesteur, German Pistor, from Latin pistor).