Dear Carla, Sorry I can not be of more help, but the Gilley name is not one I have come across in my 20 years of research in the area of Marion Co. SC, Marlboro Co. SC, and Robeson Co. NC. I am not as familiar with the Horry Co. SC lines so can not say that it might not appear somewhere in that locale. The names William, James, and the adaptation Wiley are all very familiar to the Robeson Co. line that begins with Jacob Alford and his wife Mary Pace. They arrived in Robeson Co. NC roughly around 1765. They had two sons that migrated West. James to Mississippi and Wiley to Tennessee in early 1800's. If I can be of more help please let me know.