Cad·il·lac 
(kădl-ăk′, kä-dē-yäk), Sieur Antoine de la Mothe 1658-1730.
(kădl-ăk′, kä-dē-yäk), Sieur Antoine de la Mothe 1658-1730. French explorer and colonial administrator who founded Detroit, Michigan (1701), and was governor of Louisiana (1710-1716).