My Gilleys intermarried with Alfords in IN.In Census they seemed to live near or next to each other & they also named their children after one another.
I kmow they also came to Daviess CO, IN, from SC.I looked in the 1790 Census & wrote down several names.
My family names from the early 1800s on which often repeat themselves are; William Alford, James Alford, Robert Gilley, James Gilley, Alford Gilley, Nancy Alford, Nancy Gilley, William Gilley, Henry Gilley, Mary Ann Alford, Mary Ann Gilley, James P. Gilley, Henry Gilley & John Gilley.
My grt-grandfather in IN was Alford Gilley.
Each Gilley family tended to name at least one child, Alford, Nancy or Mary Ann.
My hunch is that on the way here from SC, they lived in another state for a generation.