There were at least 2 Carson lines in Bedford Co prior to the Revolution. John Carson m Anne Dixon. He died 1762. She remarried twice - last to John Porter of Prince Edward Co. Two of the Carson children married their Porter step-siblings. With the exception of Moses Carson, the remainder removed to Logan Co KY & Sumner Co TN pre=1800. See Dobbins Bible @ Sumner Co TN site.
James Carson mca 1765 Mary Ann Helm. They had 7 children. Marriages to Porter, Owen, Dixon, among others.