NOTE:  "William is the only known child of William Sinnock and Ann Whitehead and 2^nd great grandson of Thomas Sennock (sic) and Elizabeth Looker. He and Mary had more than 100 known descendants. Della Kay from Sebring, FL (now Springville, TX) is the last surviving with the Sinnock name. I exchanged several Facebook messages in 2010 with Della about her ancestors augmenting family information from her father, Russell William in a phone converstation in 1994.