You're missing a geographical link. Kinchen and Martha were in Lancaster Co., SC before Smith Co., TN. The deed records in Lancaster are the earliest I've seen with the name Martha for Kinchen's wife. I still have not seen a verification that Martha's name was Lynch. Some have insisted that Thomas's mother was named Caroline Haynes, though I have seen nothing to support that except Thomas's middle name and the fact that his granddaughter's middle name (my great-great-grandmother, Ophelia Caroline "Callie" Killebrew) was Caroline. Thomas named a son Graves Carroll Killebrew (Callie's father) who is said to have died (in some sources) in 1915 (no place listed) and filed for a pension in 1890 (I have not seen any evidence). I have thought Martha might have been the Patty Carrell listed as an heir to Thomas Carrell of Southampton Co., VA in 1774 (wife was Priscilla)--but that would be based on onomastics only (the reuse of names)--Graves came from the Harrills (Ann's brother was Seth Graves Harrill--both children of Josiah and Sarah Harrill of NC, Maury Co., TN, and Marion Co., AL). Kinchen's parents were married in Southampton Co., VA so there is a connection. Anyway, I'm throwing out some food for thought here.