Bert; I am also researching my husband's family tree.His father was William Earl Cornelison b. 6/6/1922, d. 12/7/1970.W.E.'s father was William B. Cornelison and mother was Catherine Cornelison (nee Bybee).This information I have from a birth certificate.I am told that the B is for Baum.I have an obituary from my husband's father that says he was survived by 2 siblings, I can only find one in any documentation so far.His name is Harold but the middle intial is M.William Earl was married to a Mary R. ?, I do not know her maiden name, but was divorced in 1958 in Fayette County.They had 2 children.William Earl after the divorce moved to Illinois I am not sure when, but that is where he re-married and him and his wife had a son, William H., this is my husband.I do have some more information at home, that I will be more than happy to share, if you think we are on the same part of the Cornelison's.Please let me know.I have also been in touch with another person who has been researching the family tree.