As far as I know or rather have been able to figure out Robert Powell and Elizabeth Powell Blair were brother and sister. Which as you state would make them the children of John Powell and Mary O'Neal, and I am assuming they would be brother/sister to Elias, Sr. But if you look at Robert in the Lucas book it mentions the one born in 1750 (I believe this to be my Robert) nothing else is mentioned about him. Also in looking at the children of John and Mary, the Robert born in 1752 who marries Ann West is said to also be a son of John and Mary. So it leads you to the question were the two Roberts cousins? was one of them orphaned and raised by John and Mary? I'm kind of at the point where I take much of the Lucas book on my branch of the Powell's with a huge grain of salt!!!! And so do several others I have been in contact with. Who do you descend from down the line? Hope to hear from you soon. Also anyone else that might shed some light on these two very confusing Robert's. Im not sure if James Blair and Colbert Blair were brothers or not. I think I have that information somewhere, will look for it and get back with you. All my "stuff" is not organized in any way, need to do that.
Jennifer Powell Lyons