Antoine de la Mothe, sieur de Cadillac, born Antoine Laumet, was a French explorer and adventurer in New France, which stretched from Eastern Canada to Louisiana on the Gulf of Mexico. He rose from a modest beginning in Acadia in 1683 as an explorer, trapper, and a trader of alcohol and furs, achieving various positions of political importance in the colony. He was the commander of Fort de Buade in St. Ignace, Michigan, in 1694. In 1701, he founded Fort Pontchartrain du Détroit ; he was commandant of the fort until 1710. Between 1710 and 1716, he was the governor of Louisiana, although he did not arrive in that territory until 1713.

Michilimackinac is derived from an Ottawa Ojibwe name for present-day Mackinac Island and the region around the Straits of Mackinac between Lake Huron and Lake Michigan. Early settlers of North America applied the term to the entire region along Lakes Huron, Michigan, and Superior. Today it is considered to be mostly within the boundaries of Michigan, in the United States. Michilimackinac was the original name for present day Mackinac Island and Mackinac County.