Antoine de la Mothe Cadillac
Upon his arrival in America, La Mothe adopted his title after the town of Cadillac, Gironde in southwestern France. The city of Detroit became the world center of automobile production in the 20th century. William H. Murphy and Henry M. Leland founded the Cadillac auto company and paid homage to him by using his name for their company and his armorial bearings as its logo in 1902. Various places bear his name in America, in particular Cadillac Mountain in Maine and the town of Cadillac, Michigan.
Cadillac Eldorado
"Palm Springs Life" magazine incorrectly attributes the name to the Eldorado Country Club in Indian Wells, California, a favorite resort of General Motors executives in the Coachella Valley — though the resort opened in 1957, five years after Cadillac's own naming competition.