Re: (c) Robert Grierson (aka Grayson) of the Hillabees, & his relations

I feel I am related to this group of Graysons.My GGGGrandfather was Jim Grayson who married Lousally.I can not find any ancestors of Jim but there is word that he came from the Hillabees.Could there be a possibility that Robert is Jim's dad or some kind of relative?