Would love to see what you have on the descendants of Walter Drennen. If the interview of Hugh Drennan of Fleming county, Ky in the Draper papers is correct Walter Drennen (Drinnon) would have been the brother to Hugh's father.
Unfortunately it appears that we have both reached the initial ancestors that came from County Antrim, Ireland. I don't have much on the descendants of Walter but can share what I have come accross. Please feel free to contact me.