William G. Sebold (1899–1970?), World War II double agent against Germany in the U.S.
His father Wolfgang Gundling, who died in 1689, was a pastor at St Sebold in Kirchensittenbach near Nuremberg.
William G. Sebold (Wilhelm Georg Debrowski; 10 March 1899 in Mülheim, Germany – February 1970 in Walnut Creek, California) was a German spy in the United States during World War II, who became a double agent for the FBI.