John, I applaud your efforts. I am doing my own part, as Project Administrator of the Rea Surname DNA Project to connect Reas with their MacRae roots via DNA testing. See my post above. You may be aware that, like all Scottish clans, the Clan MacRae has many septs, of which Rea (and it's spelling variants) is but one. I think it is important to connect people of Scottish heritage with their respective clan roots. Many whose names are septs of Scottish clans are not even aware of it, yet.
Rea Surname DNA Projecthttp://garyr50.tripod.com/Rea_Surname_DNA_Project.htm