Louis Jolliet (September 21, 1645last seen May 1700) was a French Canadian explorer known for his discoveries in North America, Jolliet and Jesuit Father Jacques Marquette S.J. (June 1, 1637 – May 18, 1675), sometimes known as Père Marquette or James Marquette, was a French Jesuit missionary who founded Michigan's first European settlement, Sault Ste. Marie, and later founded St. Ignace, in which state?
Louis Jolliet:  Jolliet and Jesuit Father Jacques Marquette, a Catholic priest and missionary, were the first non-Natives to explore and map the Mississippi River in 1673.
i don't know