I daughter out too soon to make a certain connection, but there could be. I have Samuel Allen, b. 4 Dec. 1747, d. 16 Sept. 1817, married to Sarah Pancoast. They had several children, including Benjamin (my line) who may have been their youngest child - he isn't listed in some records. But they also had a son, Samuel. From the dates, I would suspect your Allen could be a grandson of this line. I have a property map dated 1753 on Samuel and Jane Allen's property in Bensalem, Bucks County.