Actually it is her mother, Clara Sitton, who was half Dutch & Irish. Wilma is half Cherokee. Her father is/was Charley Mankiller, whose parents were John Mankiller and Bettie Bolin Bendabout Canoe. John’s parents were Jack Mankiller and Susan Teehee Bearpaw. Jack’s parents were Kay-Skun-Ne (Ga-Skur-Ne_ Mankiller and Lucy Matoy both born in the Cherokee Nation east. This is the reason that the Mankillers had alloted land in Oklahoma/Indian Territory.
Yes, when I typed that Mankiller was half Dutch & Irish, I meant Wilma.