Reuben (1741-1741)
Isaac (3 Feb 1738-6 Sep 1807) — m. Mary Blaisdell
Abigail (30 Jul 1745-26 Sep 1825) — m. David Morrill
Nathaniel (1748-20 Feb 1833) — m. Ruth Smith
Phoebe (1750-????) — m. John Currier
William was born in Salisbury or Amesbury, Essex County, Massachusetts. He was the third of six children to Reuben Whittier (11 Mar 1687-18 Nov 1722) and Deborah Pillsbury (1685-2 Feb 1753) of Newbury, Essex County, who had married in Newbury on 19 Dec 1708.
Phoebe was born in Salisbury also, daughter of Deacon Isaac Morrill, Jr. (1673-1737) and Abigail Brown (1 Feb 1675-1721).
I don’t know just when William and Phoebe married. They settled in Kingston, Rockingham County, New Hampshire. Phoebe died about 1754, and William married Sarah Huntington (????-1772) in 1755.
William died in 1771 in Kingston. Sarah died the following year.
Isaac has his own entry in the family tree.
Abigail married David Morrill (17 Oct 1737-1818) from Salisbury, son of Jacob Morrill and Sarah Wait. They had four children:
Phebe (4 Mar 1762-1802)
David (17 May 1767-5 Mar 1834) — m. Mary Osgood; m. Susannah Pillsbury
Sarah (????-1802) — m. Jonathan Barnard
Jacob (4 Feb 1785-15 Apr 1833) — m. Abigail Lowell
Abigail died in 1825 in Salisbury, Massachusetts.
Nathaniel married Ruth Smith (1748-9 Jul 1827). They had eight children:
Betsey (27 Feb 1771-????)
Lamson (28 Mar 1773-????) — m. Jane Flanders
Reuben (1775-????)
Nathaniel, Jr. (20 Apr 1777-21 Oct 1861) — m. Sally ???
William (28 Nov 1781-????) — m. Ruth Fogg
John (13 Feb 1784-1860) — m. Betsey Coburn
Abigail (1789-????) — m. James Merrill
Isaac (????-1790)
Nathaniel died in 1833 in Cornville, Maine.
Phoebe married John Currier (15 Mar 1752-12 May 1809).
https://www.ancestry.com/genealogy/records/william-whittier_3805645 -- William
https://www.ourfamilyhistories.org/getperson.php?personID=I219179 -- William
https://www.geni.com/people/William-Whittier/6000000013123597856 -- William again
https://www.myheritage.com/names/william_whittier -- Includes William
https://www.ourfamilyhistories.org/getperson.php?personID=I219148 -- William’s mother and siblings
https://www.familysearch.org/ark:/61903/1:1:Q29P-3RBY -- 1714 birth of William, Amesbury
https://www.familysearch.org/ark:/61903/1:1:FC32-JH3 -- ditto, Salisbury