William was born in 1728. William Haskell ... He passed away in 1777. 
From World Family Tree, Volume 63, Pedigree 60:
William Haskell, son of Thomas, lived on a lot near that of his brother John, and just west of David Webb's. He married Margaret, daughter of James and Margaret (Goodwin) Frost of Berwick. They were married in what is now South Berwick, by the Rev. Jeremiah Wise. We have been unable to find any perfect record of his children. "History of Gorham" by Hugh D. McLellan. William Haskell married second, Feb. 11, 1773, Mrs. Katherine (Mosher) Weston. One child was born to them in Gorham --- Susanna born Jan. 22, 1775. She married Oliver Pierce of Harrison. Mr. Haskell died April 6, 1777. His name is on the tax list in 1777 for two polls, and in 1779 his widow Katherine is charged for two polls. In 1779 also, his widow Katherine executed a mortgage on her late husband's farm in Gorham and settled his estate.
From DAR: National Number 112167: William served in Captain Hurt Williams Company, Colonel Edmund Phinney's Regiment. He enlisted as a private and served as a fifer. The nine children of William are listed under the DAR National number
112166, (Add. 93).