Marengo county link below mentions wWHITFIELD slave owners

Sumpter County ALA also had a Whitfield slave owner.

Even gave WHITFIELD a historical marker:
http://www.archives.state.al.us/markers/imarengo.html

This is probably the best link, certainly sounds like a possible, especially the part that"1. Letters between Whitfield family and General Nathan B. Whitfield re: marching slaves from Florida to where Whitfield was

relocating in Alabama, 1834.",
maybe you've been through them before:
http://www.lib.auburn.edu/archive/find-aid/863.htm

And of course, the lovely rich white folks:

http://homepages.rootsweb.com/~cmddlton/gnswd1.html