AHAHARWAY AMAHAMI - ARWACHAON - ARWAOAON   Amahami Territory: Southwest North Dakota.   Portals .   Mandan, Hidatsa, and Arikara Nation : part of whose membership are Amahami descendents New Town, North Dakota Amahami Population United States (2010) - some S I O U X ONEOTA CROW     COMMENT   Due to attacks by their neighbours and a smallpox epidemic in the 1830's, the Amahami ceased to exist as a separate tribe.