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I was surprised to find this forum; I thought there was a misprint in the book. I am not researching these people, just entering information from the book "Early Settlers of Montgomery Co., Ohio" by Shirley Keller Mikesell:
"Thomas & Priscilla Cottom from Snow Hill, Worcester Co., MD to Paris, KY in 1804; to OH 1807. Son Leven b MD 3 Mar, 1793; md 1832 to Priscilla Tyler, d/o William and Judah; sons David, James, Leven d 8 Mar, 1884; wife d 30 Mar, 1885. pp 165, 166 - 'Pioneer Life in Dayton and Vicinity' by John D. Edgar."
Please see McConnell #387 for information on the Tylers.