SCOTT, DOUGLASS YATES MCELVAIN COOK MCMAHAN (MCMAHON) Researching all the above plus any collateral lines related to them. Only have one known Cook and that is Lucinda Cook who married David McElvain on 10 Oct 1924 in White County, IL. David McElvain died in Hamilton County, IL on 22 Jan 1844. Looking for the parents of Lucinda Cook who had died prior to the 1840 census. Mary Yates married Henry Douglass on 17 Jan 1826 in White County, IL and I do not know the names of Mary's parents. Darlene Shawn