Dear John, My mothers name was Congo. I have reached a wall when it comes to research. I do remember seing the name Isaac Congo on the West Virginia USgenweb, Wirt county, Logan County. There was a Henry Congo who chaned back and forth between Congo and Congrove. My great grandfather, Scott Winfield Congo, use to tell my mother there were certain parts of the family who beleived Congo was not a good enough name who changed it to "Congrove". Can't find any proof of where Scott came from, mother, father, etc. He was born in Bellsville, WVA, and lived in Longbottom, Ohio, Meig County. You might look there also. I'll be happy to send you what I have if you would like.
Good luck,
Linda