It's probably another Warren Earp. I have information for Fred Warren Earp b. 2 Apr 1889 at Monmouth, Warren co, IL. He married Myrtle J. Frahm and had children, but I don't have any names for them. This Warren Earp served in WWI and lived in Scott Co, Iowa and died in Chicago, Ill in 1956. He was a first cousin of Wyatt Earp the frontier marshal. I have info for a couple of other Warren Earps, but this one looks most likely. Do you have a birthdate or birthplace for your Warren?