It's been awhile since your post. Hope you're still around.
My maternal great grandfather, Luther nmn Cromartie (1829-1911)had an older brother, Franklin Taylor Cromartie (1825-1853)who migrated from Bladen County NC to Leon County FL. Another brother, John Quincy Cromartie (1822-1898) also was in Leon County. Their parents were James Cromartie (1767-1845) and 2nd wife Katherine Taylor (1788-1869).
In 1850 Leon County census, Franklin is enumerated in dwelling, household # 55 after 1st cousin Margaret Stroman in dwelling, household # 54. Margaret Johnson Stroman was daughter of Angus Johnson and Jean Cromartie, sister of James. In dwelling, household # 53 is another 1st cousin, John Alexander Cromartie, son of Alexander Cromartie(brother of James and Jean) and 1st wife Elizabeth DeVane(spoken DeVaughan). Franklin's brother John Quincy is enumerated in dwelling, household # 502.