The Cox family came to America when the land was still a British colony, and Edward Cox is a descendant of an American Revolutionary War soldier that served with South Carolina troops. The Cox clan from which Edward was descended was a group of Quakers living in North Carolina. During the Revolutionary War, Edward's great-great grandfather was part of a group known as the "Fighting Quakers", and was a friend of General Nathanael Greene. Edward Cox's grandfather, Aaron Cox, was an Ohio farmer that moved to Hamilton County, Indiana in 1850. In addition to his farm, Aaron Cox was a postmaster and contractor.