Mammedaty is N. Scott Momaday’s grandfather. He was a peyote man, which meant he oversaw an important Kiowa religious ritual. Mammedaty was a well-respected and important man in the tribe, but his presence in the memoir is less significant than Aho’s, which seems to be because he passed down fewer stories to Momaday. Mammedaty was known as somebody who saw things that others could not.