Hi Judy, I am so glad I can help you. I have no idea who Margaret Locke's parents were since she wasn't listed with them in the 1850 Williamson Co.,TN census. I looked in the 1840 that I have on hand and there is a Thomas Lock listed on p.25 of this census... 1840 Census Williamson Co.,TN Thomas Lock 011110001 - 1012101 (1 male age 5-10) (1 male age 10-15) (1 male age 15-20) (1 male age 20-30) (1male age 60-70) (1 female age 0-5) (1 female age 10-15) (2 females age 15-20) (1 female age 20-30) (1 female age 40-50) then there is one more Lock listed on p.61 of the 1840 and she is Elizabeth Lock, living alone, age 90-100 The Locke's seem to be connected in some way with the Grissom's and possibly Brown's. Sorry I couldn't be of any further help with your Locke family. I will keep an eye out for you. Donna (Hayes) King