The first Europeans to see Lake Michigan were French traders and explorers in the 1600's. One of which, Samuel de Champlain (1567?-1635), who mapped much of northeastern North America, called Lake Michigan the Grand Lac. It was later named "Lake of the Stinking Water" or "Lake of the Puants," after the people who occupied its shores.
In 1679, the lake became known as Lac des Illinois because it gave access to the country of the Indians, so named. Three years before, Claude-Jean Allouez (1622-1689), a French Jesuit missionary, called it Lac St. Joseph, by which name it was often designated by early writers while others called it Lac Dauphin.
Another story recounts that Jean Nicolet, the first European to set foot in Wisconsin in 1634, landed on the shores of Green Bay and was greeted by Winnebago Indians, whom the French called "Puans." Lake Michigan was labeled as "Lake of Puans" on an early and incomplete 1670 map of the region that showed only the northern shores of the lake. However, only Green Bay is labeled as "Baye de Puans" (Bay of the Winnebago Indians) on maps from 1688 and 1708. On the 1688 map, Lake Michigan is called Lac des Illinois.
An Indian name for Lake Michigan was "Michi gami" and through further interaction with the Indians, the "Lake of the Stinking Water" received its final name of Michigan.