This is one of those cases where there are two hostas with the same name. Neither is registered with The American Hosta Society. The first one to be registered would become the "official" hosta of that name and the other would have to be renamed.

This is a non-registered hosta which was originated by Randy Goodwin of Indiana. It is the variegated hosta shown above.

This is another in the series of "American Indian Series" of hostas by Van Wade of Wade and Gatton Nursery (Closed 2019) of Ohio. It is the upright, dark green hostas shown above.

The Mandans were a tribe that lived in North Dakota.