SKurlock's, SPurlock's and SCurlock's are each a different DNA line.Sometimes the crossovers are because people can't read their writing.
If your unnamed Grandma is a SPURlock you need to state her name.Ken Haas use to be researching the SPurlock's.He found, if I remember correctly, no connection to the SCurlock's.The SKurlock's in White & Warren Co, TN all changed their names in 1938-1940 (when SS came out) to SCURLOCK's.That is causing quite a bit of issues in TN.
SKurlock's lived over in White and Warren co, TN early on. The "real" SCurlock's settled in Humphrey Co, TN.The "real" James Scurlock that everyone wants to be related to was in Sumner, Davidson and Williamson Co, TN as he moved westward after the revolutionary war.
So...without a grandma name can't suggest anyone....suggest to chase the SK or SP depending upon what documentation you have.To get responses to Queries....mention name, place, approximate and you'll get more hits.
P.S.Mial Scurlock of the Alamo fame is the grandson of Mial Scurlock of NC.The father of Mial (Alamo) was Joseph who was also the son of Mial.