I think this must be the same John Maxwell who is a direct decendant of mine. He was bonr in Ulster Ireland abt. 1700 and married Mary Jan. 10, 1726/27.  He is father of James Maxwell who was married to Jane Roberts. They were married in Philadelphia. I do not have any information about the ship, point of origin, etc. Mary and John were married in Downpatrick, Down Co., Ireland.