Eleanor Allen who married James H. Pass in Rockingham County in 1844 was surely a daughter of Benjamin Allen and Frances Collins. Benjamin was one of only two Allens who had a female of Eleanor's age in their household in 1840 and the Allens and Passes lived next to each other in Rhea County in 1850.
Benjamin was listed as Benjamin Allen Jr in the 1820 Rockingham census and it seems to me that the Benjamin Allen Sr in that census was the prime candidate for being his father. Do you know anything about Benjamin Sr?
I'm also trying to find out if Frances Collins' father was John Collins and if the William Collins who lived near the Passes in Rhea County in 1860 was her brother. Do you have any information on Frances' family.