Background
He was the son of the 2nd Earl of Essex.
He was the son of the 2nd Earl of Essex.
Capell was one of the founding governors of the charity, the Foundling Hospital, created in October 1739 to care for abandoned children. On 27 November 1718, Capell married Lady Jane Hyde, a daughter of the 4th Earl of Clarendon and they had two children:
Charlotte Capell (d 1790), married the Thomas Villiers, 1st Earl of Clarendon and had issue. Lady Mary Capell (d 9 April 1782), married Admiral Honorary
John Forbes (a son of George Forbes, 3rd Earl of Granard).
They had two daughters, Maria Eleanor Forbes who married John Villiers, 3rd Earl of Clarendon and Katherine Elizabeth Forbes who married William Wellesley-Pole, 3rd Earl of Mornington.
Royal Society; Privy Council of the United Kingdom.