Hi Ron,
In collating your information into mine I found the following information.
1850 Census Leon County, FL (p.74)
David E age:50 Farmer born SC
Martha age:40 SC
Martha age:18 SC
Carrissia Age:16 SC
Eliza age:15 SC
David age:22 Farmer SC
Mac age:12 SC
Julius age:1 SC

Francis E age:28 Physician SC
Mary Ann age:25 GA
David age:2 FL
Edward age:1 FL
Margaret age:2 mo FL

I also found a note indicating David Hall Carn was born 24 Dec 1847. This is a verbal passing of knowledge from my grandmother to my mother.

Do you think this David E. Carn is the father of Francis E. Carn and that his brother Julius was only 1 in 1850? The names and ages fit. Baby Julius could have been named after his uncle Julius Marcellus.

I also have marriage records from Leon county for
Ms. Eliza Carn.......1850
Ms. Martha Carn......1854
and several other young ladies named Carn between 1850 and 1880.
Whatch think?
Jacque