According to the website Milwaukee.org:
"Long before the first settlers came to this area, the Algonkian Indians had a special name for the land: Millioki, which means "gathering place by the waters." The Indians may have picked the name because they used the area for tribal gatherings or because they observed how three rivers (the Menomonee, the Kinnickinnic and the Milwaukee) met before flowing into the waters of Lake Mie-sit-gan (Michigan)."
