Some say his father (either John or Thomas) was from Dublin and also Ipstones, Staffordshire, England as URLs below.
Allen may or may not be English. this listing says it is, but this was an opinion of several Dublin volunteer workers at the local records office, since it is not like "O'Leary" or "O'shanahan". When I went to Ireland, the old guys would say "You're not Irish" for the same reason. This could be the case, although there are 2 major place names in Ireland: the Lough Allen (a large lake) and the Bog of Allen (a marsh), both west or nw of Dublin.
It is also said the Allens were allied to the MacFarlane and MacDonalds in the isles of western Scotland (Hebrides), hence from that area.
These volunteers would have been correct in saying that the Allens did emigrate to Ireland around the time Elizabeth I to Cromwell, since that is when "non natives" were being settled into the north of that island.
This listing says: 516. John Allen I was born on 3 Aug 1694 in Sussex, England. He died on 16 Sep 1771 in London Grove, Chester County, Pennsylvania. He married Amy Cox in Mar 1718/1719 in Newark, New Castle, Pennsylvania. From: http://www.danbarker.com/qs/default.asp?iId=KDFJGhttp://www.danbarker.com/qs/default.asp?iId=KDFJG
Some say he was from Sussex, Ireland in the north, but there is no Sussex in Ireland.
The names and birthdays match, and his father died 1713, when it is said John b 1694 emigrated from Dublin, since his father had just died.
I have no problem being either Anglo-Irish, or Scots-Irish. I would however care to know something definitive. They were, as Quakers, of the Protestants in the north of Ireland, but as Dissenters, they would have been quite poor and non-influential.
This was also a period of transition to the new Hanoverian (German) monarchic line so the socio-political climate may have been quite difficult for those of the Dissenting faiths in the British Isles. More the reason to emigrate.