From 1733 to 1738, he attended Shrewsbury School, and in 1738, matriculated at Magdalene College, Cambridge, subsequently gaining a BA in 1741.

[1] He was sent by the Society for the Propagation of the Gospel in Foreign Parts, or Venerable Society, to assist at St Paul's Church, Halifax, Nova Scotia under the auspices of the Bishop of London, while the rector William Tutty returned to London on private business, during which trip Tutty died in 1754.

[6] On 13 September 1778, his first wife died, shortly before the 28 November 1778 wedding of their daughter Anne in St George's, Hanover Square.

With his second wife, he appears to have returned to London shortly after 1785, continuing to draw his Halifax salary of £190 pa until he resigned and was replaced in 1791.

Breynton married twice: He married firstly Elizabeth Wade (died 13 September 1778 Halifax, Nova Scotia), on 8 September 1750 at St Mary and St Michael Church, Trumpington, Cambridgeshire, with issue: He married secondly the widow, Mrs Mary Gerrish née Cradock, (18 May 1723 Boston, Massachusetts, United States - December 1806 Lichfield, Staffordshire, England), on 9 September 1779 at Halifax, Nova Scotia, with no issue.