Background
Maynard was the eldest son of William Maynard, 2nd Baron Maynard of Estaines and his first wife Dorothy Banastre, daughter of Sir Robert Banastre of Passenham, Northamptonshire.
Maynard was the eldest son of William Maynard, 2nd Baron Maynard of Estaines and his first wife Dorothy Banastre, daughter of Sir Robert Banastre of Passenham, Northamptonshire.
He succeeded to the peerage as Baron Maynard in 1699. He travelled abroad in France, Italy, Germany and the Netherlands from 1660 to 1662. He was commissioner for assessment for Essex from 1663 to 1680 and commissioner for recusants in 1675.
He was a Justice of the Peace from April 1688 to his death and was commissioner for assessment for Essex again from 1689 to 1690.
He succeeded to the peerage as Baron Maynard on the death of his father on 3 February 1699. Their children included:
Henry Maynard, 4th Baron Maynard (c 1673–1742)
Grey Maynard, 5th Baron Maynard (1679–1745)
Charles Maynard, 1st Viscount Maynard (c 1690–1775)
Honorary
Annabella Maynard (d 1734) who married Sir William Lowther, 1st Baronet.
Cavalier Parliament]
In 1663 he was elected Member of Parliament for Essex in a by-election to the Cavalier Parliament.