Sandy - Your Thetford descends from Walter Thetford who sold his land in New Castle, Delaware with wife, Rebecca Ramage. They located next to Orange Co., NC. where Walter left a Will in 1767. His son Simon was in Laurens Co., SC in 1790 and then located with his family to Caldwell Co., KY. They married with a Bush family in SC. Also married with Bannister and perhaps a Gray and maybe a King family as well.