The Assiniboine or Assiniboin people are a First Nations/Native American people originally from the Northern Great Plains of North America. The Assiniboine people are also known as “Stonies” in Canada, a name British explorers and traders used.  Today, they are centered in present-day Saskatchewan. They have also populated parts of Alberta and southwestern Manitoba in Canada, and northern Montana and western North Dakota in the United States. They were well known throughout much of the late 18th and early 19th century and were members of the Iron Confederacy with the Cree.

Resource: https://en.wikipedia.org/wiki/Assiniboine