Notes for William Bennett Jr

1790 census Northumberland, PA
Wm Bennitt 2-3-4
2 males age 16 & older (William, age 79 & Robert, age 17)
3 males under age 16 (Anthony, age 13, Henry, age 12, Samuel, age 7)
4 females (Ann, age 53, Margery, age 6, Elizabeth, age 4, Margaret, age 3)
Next to Robt Bridgens, and near William Reed, James Bennitt, Henry Thompson, Benjamin Thompson. Where is William Bennett, Jr, age 20 or John Bennett?

84 William Bennett, Jr., the son of William and Ann Bennett was taxed in Bald Eagle Twp. Northumberland Co. Pa. May 1, 1787. (There is a Wm. Bennett's Will, and could belong to this William as specified in the History of Clinton County, Pa., and as stated in a letter from Florence Collins). Additional details re William Jr. are unknown at this time. 59

http://freepages.genealogy.rootsweb.com/~bakerfamilylines/bennett/bennettp2.html
ii. WILLIAM BENNETT, b. Abt. 1770.

Notes for WILLIAM BENNETT:
William stayed in Northumberland Co. (Northumberland Co. Letters of Administration Book 5, p. 534 or 543: William A. Bennett, Dec. 6, 1868 to Oct. 4, 1871 for Mary T. Bennett; $5000.)
Single in 1786.
I think he was most likely to have been the oldest son being named after his father and grandfather.
He was probably dead by Nov. 1803 as Anthony not he was administrator of Samuel's estate. As the older brother he would probably have been named the administrator, Anthony and Henry along with a Moses Scott were bondsmen for the estate.
More About WILLIAM BENNETT:
May 01, 1778, Taxed Bald Eagle twp. Northumberland Co., PA.
1785, might be the Wm. Single freeman Bedford Co., Archives p 85

Is this William born 1711 or William born 1731-1770???
"Bennett Family history: William Bennett was born in 1711, died in 1812, 101 years old. It is said he built the first keel boat on the Susquehanna, before emigrating to North Shenango Twp. It is likely that William was one of the first settlers on the Susquehanna perhaps around the years 1753-1754. William Bennett was a First Lieutenant* in Capt. Somme Dale's Company formed in Upper Div. of Northumberland Co. was among the body of soldiers present at Ft. Augusta on 25 June 1777. Col. Bennett erected the first grist and saw mill in the township in 1800 or 1801 on Bennett's Run, and both were operated for many years. He was a Major in the 133rd Regiment under Col. Samuel Goudy in the War of 1812--promoted to Colonel."
Source: The Espy-Espey Genealogy Book
*Wm#2, if he was a 1st Lt in 1777, he would have been 66 yrs old. Those over 60 wer not expected to serve. It has been reported to us that the Espy book may contain many errors, check carefully.