I don't have anything else at this point. William Allen is the farthest I have, but I've traced his wife's mother's line back to 1180... Hoping to do the same with the Allen's!! I have noticed though, that there isn't much on them.
As for his middle name, I have no idea. His son is Samuel H, but I have assumed that was Samuel's mother's name of Hubbard.
You may have found this already but if you go to http://www.rootsweb.com/~nytryon/tax.htmlhttp://www.rootsweb.com/~nytryon/tax.html you will find a tax assessment with William Allen (the only Allen on the list, btw) the 8th one down.