When was your Bridget Creighton born? I have a Bridget Creighton that came to USA about 1804 settled in Ohio. When she came here she used the last name of Creighton for herself & all her children, James, Francis, Chistopher, Michael, Mary, John, Andrew. They were all from Monagham,Ireland. I have no husbands name. I know that it sounds far fetched, but I have learned to never assume that you have everything correct until you can prove it. She could of left your O'Malley to start a new life in a new land under her madden name. If any of this fits I would like to hear from you.