General Thomas Sumpter - Spelling

Like this person Brig. General Thomas Sumter ("The Carolina Gamecock")?

The birth day is one month off, and I doubt that his first name was General either.

Yes, this is THE General. As far as the spelling of the surname, it changed in documents. Documents a generation or two after General Sumter had the "p" put into the name. These documents were government document/legal documents, etc. you will find this change on some, but not all documents.
I know the folks at Fort Sumter are very, very adamant that the General's name is spelled without a P. So, Jami, it's not your mother's fault that she spelled her name with a P, it happened generations ago.
Our family line comes down from the General's brother, Capt. William.

Very very fascinating. My husband and I want to plan a vacation there sometime.