3 of my G-G-G-G Grandparents were born in SC and migrated to Kentucky. I only have SC as their birthplace from census records, but I think they may have been from near Greenville because my G-G-G Grandmother was named Greenville Hiett.

I am not sure where are the best places to look for information. Any pointers or tips about good ways to find information for the Greenville area would be greatly appreciated.

Specifically I am trying to find information about the following people who migrated from SC to the Jackson Purchase area of Ky apparently just after the Jackson Purchase:

George Bennett Roberts, b. 8 Jul 1802 in SC
Melissa Roberts, sister to George, b. 1808 in SC
John W. Hiett, b. 1790-1800
Sarah Jones, b. 1813 in SC

I do not know for a fact that the following are my relatives but it would appear they migrated around the same time as my relatives. So there is a decent chance they are related in some way:
Aron Hiett, b. 1787 in SC
Littleberry Hiett, b. 1812 in SC

Any pointers for where to look would be appreciated. Thanks!