Hannah Abercrombie was my 6th gr.grandmother, through her son, Hiram. Hiram Thomason m. Rebecca Montgomery in Hall Co. Georgia. My line down from Hiram then goes into NW AR, where many of this bunch went prior to the Civil War; we believe it's because many of them were Union sympathizers, as evidenced by the number of them who enlisted with the Army in MO. You're probably aware of the research compiled and published, with updates, by Carol Jacobson of Oregon, on Thomason/Abercrombie familes. It's pretty useful, as the information is source documented.