William was the eldest son of Sir Benjamin Ayloffe and his second wife, Margaret, the fifth daughter of Thomas Fanshawe.
He was born on 3 December 1618.[1]

Like his father he supported the Royalist cause in the English Civil War. He was a colonel of a regiment at the siege of Colchester. On the death of his father in 1662 he inherited the family estates and baronetcy. He died in 1675, and was buried at Braxted. As he died without any surviving children, Benjamin, his younger brother, inherited the baronetcy

" The siege of Colchester occurred in the summer of 1648 when the English Civil War reignited in several areas of Britain. Colchester found itself in the thick of the unrest when a Royalist army on its way through East Anglia to raise support for the King, was attacked by Lord-General Thomas Fairfax at the head of a Parliamentary force. The Parliamentarians' initial attack forced the Royalist army to retreat behind the town's walls, but they were unable to bring about victory, so they settled down to a siege. Despite the horrors of the siege, the Royalists resisted for eleven weeks and only surrendered following the defeat of the Royalist army in the North of England at the Battle of Preston (1648).

George I 28 May 1660 – 11 June 1727) was King of Great Britain and Ireland from 1 August 1714 and ruler of the Electorate of Hanover within the Holy Roman Empire from 23 January 1698 until his death in 1727. He was the first British monarch of the House of Hanover as the most senior Protestant descendant of his great-grandfather James VI and I.