Algernon Capell, 2nd Earl of Essex PC (28 December 1670[1] – 10 January 1710, Watford) of Cassiobury House, Watford, Hertfordshire, was an English nobleman, a soldier and courtier.
He was the son of Arthur Capell, 1st Earl of Essex[2] (1631–1683) by his wife Elizabeth Percy, a daughter of Algernon Percy, 10th Earl of Northumberland.
After his father's suicide in 1683, Capell became the 2nd Earl of Essex.
He held the office of Gentleman of the Bedchamber to King William III between 1691 and 1702.
On 28 February 1692 Algernon Capell married Mary Bentinck, a daughter of William Bentinck, 1st Earl of Portland by his wife Anne Villiers, by whom he had three children:[3] [4]