There are two different Thomas PORTERs, both from Fauquier.
My ancestor is Capt. Thomas PORTER b. c. 1734 England d. 1799 Fauquier who m Sarah WEAVER, dau of Tighlman WEAVER of Germanna.
The Thomas who m Ann SHROPSHIRE was born c 1720 and also served in the Am Rev. He was supposedly the son of Thomas PORTER and Ann CALVERT. This Thomas was probably born in Stafford Co., VA