The new name honors the French explorer and adventurer Antoine de La Mothe Cadillac. In 1688, De la Mothe requested and received from the Governor of New France a parcel of land in an area known as Donaquec which included part of the Donaquec River (now the Union River) and the island of Mount Desert in the present-day U.S. state of Maine. Antoine Laumet de La Mothe, a shameless self-promoter who had already appropriated the "de la Mothe" portion of his name from a local nobleman in his native Picardy, thereafter referred to himself as Antoine de la Mothe, sieur de Cadillac, Donaquec, and Mount Desert.