I also have a Sweatt line. I have seen a paper where the name of my ggrandfather is spelled Swett, Sweat, and Sweatt all on the same paper. I also have talked with people who have at various times in their family had one t then two ts then back to one t. Also there are about 6or 8 spellings of the name Swet, Swete, Swett, Swette, Sweat, Sweatt, and Sweet are the spellings I have seen. And yes, even the Sweet is pronounced just like the other spellings. Patsy