Thanks for the suggestion. There might be some distant connection. Brantley Harlan Gilmer/Gilmore was the son of John Harlan Gilmore and Amanda Miller. John Harlan was son of Francis Gilmore and Nancy Buffington. Francis Gilmore was son of James Gilmore and Easter. James was the son of Francis Gilmore b. abt 1730, place of birth and name of wife unknown. However, Francis was in Lincoln Co., NC by 1771, purchasing land there and then in York Co., SC by 1785. Francis died there about 1811. Some of the family moved to Hall County, GA in the early 1800's and then after the civil war to Marshall Co., MS. The picture I have of Brantley was taken about 1866 when he was an infant.
I ran across a mention of a John Gilmore several years ago in a deed. It might be of interest or help to you. "The first official record of the Irwin (Erwin) presence in the Carolinas is a deed of March 4, 1756, recorded in Anson (later Mecklenburg, and still later Cabarrus) County, North Carolina. This document places the family on Rocky River in what is now northern Mecklenburg County and southern Cabarrus county. Matthew identifies himself in the deed as a tailor selling cattle to one John Gilmore for "£4 money of Carolina." Witnesses to the deed were John McClean and McN. Irwin. It was recorded by Nathaniel Alexander on April 3, 1756."