Where were they living? When?
Robert Clayton  

3/29/1799 - living in Columbia County, Georgia
1800 - living on Loyd's Creek in Columbia Co., Georgia
1805 - living on Little River in Columbia Co., Georgia (source: 1805 tax list, Columbia Co., GA)

1820 Monticello, Jasper Co., GA (1820 US Census)

1824 Monroe County, Georgia
1828 - wife joined Bethel Baptist Church in Taylor Co., Georgia
1830 - living in Jasper Co., Georgia.
1840 - living in  Coweta Co., Georgia (source: 1840 US Census)
1860 Tallapoosa Co., AL (Source: 1860 US Census)
Thomas Clayton  

1774 - Granted Land in St. Paul's Parish, GA

1786 - Sold land in Richmond Co., GA. described as "from Ninety Six District, SC"

1797 - Columbia Co., GA

1805 - Columbia Co., GA

1809 - Morgan Co., GA

1815 - Putnam Co., GA
John Willingham  

1786 - Richmond Co., GA

1818 - Columbia Co., GA