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For your Kea/Kiah ancestor, you might look in records for Edgecomb Co./Old Dobbs County, NC. If your Kea/Kiah ancestor moved to either Chester County, SC or the Darlington District of SC, in the late 1700's (after the American Revolution), you might look at the Census of 1810 - African-Americans were listed, although not by name. Also, the name was frequently spelled as "Key" by the Census. We have tried to connect with the Isle of Wight Co., Va. family because of the spelling similarities (Kae, Kea, Kee and Key), but have not been able to do this on paper. We currently have a YDna tester who claims a relationship to the IOW, Va. family, but we have not seen the documentation yet. He does genetically match our "Key/Kea" group. We have not been able to find our original immigrant ancestor to the "New World" either, although we do genetically match a British family from St. Augustine, Fla. (during the British period 1760's) and the Bahamas (British Loyalists during the American Revolution).
Our YDna Haplogroup indicates that we are descended from Danish Vikings/Anglo-Saxon/Normans who probably invaded Great Britain. I'll let you know, if we do find our original immigrant ancestor (if you think that your family could be associated with ours). Good Luck!