Quick question, the 1789 Orange Mott born in Virginia, what county was he born in? I am decendant of William Mott that was out in Fauquier about that time frame and having similar problem with decendancy. William married into Welch family out in Hampshire, VA which split from I believe Orange County. Couple of Mott families up in Northumberland County, VA area.
Orange is fairly unique given name, so easy to spot.