Sue, I can help you as "your" Isaac's brother Chauncey was my great great great grandfather. Your Isaac had 11 children and goes back to Samuel 1588-1648 of Windsor COnnecticut. However I am confused by your statement of John who is buried in Enfield 1640. The John I believe you mean, died September 18, 1675 in Deerfield, Masachusetts in the Battle of Bloody Brook. There are other John's but thier birth and deaths would not coincide with 1640. I have a book on the descendants of Samuel Allen, Your Isaac is clearly in it. Contact me, love to hear from you and forward information to you.