We both have the same decreased date of 5/2/1648 in Sandwich.
Info I have:
George Allen b. 1582 d. 5/2/1648 in Sandwich, MA. m. Catherine, had 5 sons, m. Sarah, had 4 sons in England, migrated to MA in 1635, had 3 more sons. I have no records of any daughters. Only Sarah's children came with them.
George's eldest son Ralph b.1617 d.1698, had eleven children, his son Joseph b.1647 d.___ migrated to MA.
I would tend to believe that the 5/2/1648 date is if fact my "George,” he would have been 66 years old. Based on your DOB, he would have been 80!