I have some additional info. that might help you regarding JACOB ALLEN.
On the 1835 Broome Census: Jacob Allen: 3 males (2 subject to militia duty and 1 entitled to vote) and 3 females
On the 1855 Conesville, Schoharie Co., NY census:
Allen, Jacobage 80 (so b. 1795)b. Dutchess Co., here 61 yrsand Allen, Anna age 70 b. Saratoga Co., here 43 years.
I'm think that Jacob may have been married twice.In the Richtmyer-Case Cemetery Records:Allen, Phebe d. 18 May 1829, age 61, wife of Jacob.So 1829 minus 61 means Phebe would have been b. 1768 .. maybe a little old to the the wife of the above Jacob??However, the name Phebe caught my attention as one of your "family" names.