Mathematically speaking, you probably are Lincolnshire Langton, because they are the largest and most widest spread of all the Langtons. The next largest is the Lancashire ones. There is a slim pssiblity that the Lancashire ones could tie in as well to Lincs, but the earliest gens of theirs are missing. I shall look around to see where Hugh is buried. Regarding his illegitimates, there is one female named who was given a manor.But the others, I haven't seen any names. I'll look around the net.