John Barrington, who died in Paris on 2 April 1764,[2] and the former Elizabeth Vassal (a daughter of Florentius Vassall, a wealthy planter and slave-owner, and Mary Foster, a daughter of Col. John Foster of Jamaica).
His uncle William served as the Chancellor of the Exchequer and became the 2nd Viscount Barrington.
Barrington was educated at Westminster School and Christ Church, Oxford, where he was admitted a King's Scholar in 1774.
On 12 February 1788, Barrington was married to Elizabeth Adair, a daughter of Robert Adair and Lady Caroline Keppel (the second daughter of Willem van Keppel, 2nd Earl of Albemarle), a descendant of Charles Lennox, 1st Duke of Richmond.
Together, they were the parents of ten sons and five daughters, including: Lord Barrington died on 4 March 1829 in Rome.