I have a James Rennick (b. ca 1748) who married Mary (unknown) and died 1812 in Woodford Co, KY. They had:
1. Sarah Rennick married a Sulton or Sufton 2. Mary Rennick (b. ca 1765) married 29 Jul 1794 Uriah Jones (my ancestors) 3. Lyddia Rennick 4. Margaret Rennick and possibly others
The "Sulton/Sufton" could certainly be a misreading of Sutton. My information came from "Kentucky Frontiersmen Located in Census and County Records Vol II, Will Book A, B, C, D Woodford Co, KY" by Doris Nave and Barbara Augspurger. Unfortunately, I don't have anything else on Sarah. Let me know if you find anything on James & Mary Rennick.