His relationship has not been proven yet. Reportedly married to Hester LNU. Lorna Schindler has provided much documentation.
Reportedly- Three Cameron brothers came to MS from SC. Two stopped in central MS while the 3rd came to Marion County. They were apparently Scotch-Irish aka Ulster Scott.
Census:
1800: Liberty, Marion, SC
1807: Left the Nichols area of Old Marion, SC near Little Pee Dee, SC
1810: Marion County, SC
1813: Marion County, SC 850 Acres
1820: Marion, SC
1860: Marion County, MISSISSIPPI