I thought Kay Blade, but my much more knowledgable cousin said he didn't think so. Also considered it being a Lange. It is a southern kansas find, but Texas points can sure be found here.
Williams is a good call as it's listed in Overstreet as being as far North as OK.
BUT. . .there is a dead ringer in all aspects in your area of NC in the Overstreet 10th. = DELHI
Division lines and names are not the final judgement, drifting through different areas the book, a few points show great similarity but are a diffent name because of geography.
A very good way to get closer to it's origin is to get to a flint show and show it around to experts.
Experts that are knowledgeable about the type of flint, where is that material common to . . ?