Youve had to wait a couple of years, but i think i know the answer to your query.
I today published a list of Immigrants on the lostlangtons website and one of the Langtons I listed was john B Langton and his wife Ellen, from Ireland to Pennsylvania, bettween 1865 and 1882.
They had a son Peter Xavia who was born in Girardville, PA. and died in Locust Gap, Northumberland, PA. I dont have details of all ten of Peters children, only 7, but it sounds like you might have more info.
I do have details of John B Langton's ancestors to a point, and I am working on identifying his English origin.
P.S. my wife is also called Charlie Langton. Thanks Joel