Young Winnebago girl. Photo: 1900. The Winnebago have been known to the whites since 1634, when the Frenchman Nicollet found them in Wisconsin, on Green Bay, at which time they probably extended to Lake Winnebago. At this period they were found wedged in by central Algonquian tribes, particularly by the Sauk and Foxes and the Menominee. To the west they were in intimate contact with a kindred tribe, the Iowa, who in turn were neighbors of the Otoe and Missouri.