I read your message and assumed some of past history revolving around the Cantey family...and this is why I write..
Of the history I have in the general area..you are describing
I find a Thomas Sumter born 13 Aug 1734 in Va.. and died at
South Mount Plantation, S. C...
What is interesting...He married a Mary Cantey...and they had
one son...of my knowledge...Thomas Sumter...
Your Cantey line may have come as a brother of Mary Cantey..who would have been born..about the same dates or later...than Thomas b. 1734..... firstname.lastname@example.org