Adoniram Oxley Bullack (1857-1898) was an American outlaw who was affiliated with the Del Lobo Gang during the Wild West. In 1898, he participated in the theft of Benedict Rowlands' wagon from Tumbleweed, Arizona, and he and several other Del Lobos were killed by the gunfighter known as the "Arizona Kid" when Arizona came to their Cueva Seca hideout to recover the stolen wagon.