Ely Samuel Parker, born Hasanoanda, later known as Donehogawa, was an engineer, U.S. Army officer, aide to General Ulysses Grant, and Commissioner of Indian Affairs, in charge of the government's relations with Native Americans. He was bilingual, speaking both Seneca and English, and became friends with Lewis Henry Morgan, who became a student of the Iroquois in Upstate New York. Parker earned an engineering degree in college and worked on the Erie Canal, and other projects.

Lewis Henry Morgan was a pioneering American anthropologist and social theorist who worked as a railroad lawyer. He is best known for his work on kinship and social structure, his theories of social evolution, and his ethnography of the Iroquois. Interested in what holds societies together, he proposed the concept that the earliest human domestic institution was the matrilineal clan, not the patriarchal family.