I know I've already replied personally to you on this question last summer, but I'll repeat my opinion for others who may also be interested.
I know that John Ray & Hannah Hasty/Hastey are often given as the parents of James Rea [Henry Co VA] in several WorldConnect trees [wc.rootsweb.com].I've written emails to these various posters but have never gotten a response stating the source of the info.One of the trees [from A Deason Smith] even states that there is no proof of this connection.On the other hand I have heard from Joseph C Rhea, who wrote Ray-Rhea: a family book of history and genealogy for Rhea and related families (1969) in which he describes how he is descended from John Ray & Hannah Hasty.The passage in the book that seems to have led to the confusion has been transcribed in this old RHEA-L post
It is now clear from Y-DNA evidence that the results from descendants of Joseph C Rhea do not match those of the descendants of James Rea of Henry Co, VA.Therefore these two Rea lines are not related.
Similarly, a group of descendants of Matthew Campbell "The Rebel" Rhea have had Y-DNA testing and those results match neither the John Ray/Hannah Hasty line nor the Henry Co James Rea line.
The Y-DNA studies have turned out to be quite powerful in showing connections between the various Ray/Rea/Rhea/etc families but they also show that there were many different families who used the surname Ray in its various forms.