Records concerning William Briggs, son of John Briggs and Agnes Thayer, are a bit more plentiful once William settled in Massachusetts with his family.

William Briggs was born c1645, most likely in Thornbury, Gloucester, England, but his birth year falls in the gap in the local church records. His father first appears in Taunton records in 1657, so William was probably just entering his teenage years when the family made the trip across the ocean.

William Briggs married Sarah Macumber on 6 November 1666 in Taunton, Bristol, Massachusetts. Sarah was the daughter of William Macumber and Ursula Cooper of Dorchester and then Marshfield, Massachusetts. Sarah was born c1643 and died in childbirth on 20 March 1680 in Taunton. William probably married (2) Abigail Mason a year later, on 7 April 1680/81 in Dedham, Norfolk, Massachusetts.

William and Sarah were the parents of seven children, all born in Taunton, Bristol, Massachusetts:

1. William, born 25 January 1667/68; died 20 February 1731, Taunton, Bristol, Massachusetts; married (1) Elizabeth Lincoln (2) Mehitable Blake
2. Thomas, twin, born 9 September 1669; died before 22 September 1746, Taunton, Bristol, Massachusetts; married Abigail Thayer, 24 October 1689, Taunton, Bristol, Massachusetts
3. Sarah, twin, born 10 September 1669; no further record
4. Elizabeth, born 14 March 1671; no further record
5. Hannah, born 4 November 1672; probably married Samuel Waldron, 17 April 1693, Taunton, Bristol, Massachusetts
6. Mary, born 14 August 1674; perhaps married John Forrest, 24 July 1712
7. Mathew, born 5 February 1676; died 8 March 1764, Dighton, Bristol, Massachusetts; married Abigail Burt, c1706
8. John, born 19 March 1680; died before 26 January 1756, Norton, Bristol, Massachusetts; married Hannah Rockett, c1712

William Briggs died on 3 January 1728 in Taunton, Bristol, Massachusetts.