Cris, The Alexanders brought over on the ship Welcome was the New York, New Jersey line. I have seen the material on that and can send that to you.
I have been trying to establish where the John Alexander of London Britain, Chester co comes in. I suspect he was related to our line of the Somerset/Cecil Co Alexanders. He was married to Susannah and died in 1765 and Theophilus and John McKnitt Alexander witnessed his will. It was great to get all that material you sent. Helen Smith