Claim: Wyatt Earp's brother was born in 1841.
Evidence: In 1876 , he followed his brother James to Dodge City , Kansas , where he became an assistant city marshal.
James Cooksey Earp -LRB- June 28 , 1841 -- January 25 , 1926 -RRB- was a lesser known older brother of Old West lawman Virgil Earp and lawman/gambler Wyatt Earp.