Sankofagen Wiki run by Karmella Haynes has a list of Mississippi Plantations and Slave Names listed by county, for counties formed prior to 1865.
“SANKOFA is an Akan word meaning “go back and take.” Good and useful things can be taken from the past to drive positive progress in the present through the benevolent use of knowledge.”
“Sankofa-gen Wiki is a growing collection of freely accessible genealogical and historical data pertaining to U.S.A. antebellum plantations, farms, factories, manors, etc. that used African slave labor. This site is a wiki which means that you, the slave genealogy researcher, can add and update information instantly. This website aims to summarize plantation-related data in a way that allows the genealogist to better visualize the lives of our enslaved ancestors within a historical context…
Was the slave buyer a relative of the seller?
Did the buyer relocate?
Were plantations connected by slave holder marriages?
Was my ancestor sent away to another plantation because the planter’s family owned plantations in other states?”