Some believe the Potawatomi originated as a people along the Atlantic coastline at the mouth of the St. Lawrence River. Archaeologists say they migrated south from Ontario about 1,000 years ago. Other tribal elders, including Michael Williams, told that Potawatomi originated at the mouth of the Grand River at its mouth at Lake Michigan or along the St. Joseph River near Mishawaka, Indiana. Some followers believe over centuries, along with the Ojibwe and Odawa Anishinaabe peoples, they migrated west to the Great Lakes region some 500–800 years ago in a "Great Migration."