I hate to throw more confusion on the "name game" but my GGGgrandfather Asa Kellam of Hardin Co, KY has his surname spelled 10 different ways over a 20 year record of property taxes in the early to mid 1800s. One variation was Kellum. To further muddy the water, the descendants of his son Samuel ( Asa had at least 6 sons ) use the spelling Kelm to this day. I suggest you consider working on Perry Co, IN where there is one of larger concentrations of persons with this surname group. I note that Rick Kilham has replied to you. He knows more on this subject than the vast majority of interested parties. When in doubt, my advice is to refer to him. Ron Kellems