Denbigh was the son of Basil Feilding, 4th Earl of Denbigh and Hester Firebrace, only daughter of Sir Basil Firebrace, 1st Baronet.
In 1718 at Utrecht, Lord Denbigh married Isabella Haeck de Jong (1694–1769), daughter of Peter Haeck de Jong, burgomaster of Utrecht.
[2] Lady Denbigh's sister, Maria Catherina Haeck de Jong, later married the Marquess of Blandford, who, according to Lord Egmont, took after Denbigh's example of marrying an older Dutchwoman for love.
[5] In the 1730s, the Earl and Countess of Denbigh were said to have been living "very elegantly in the middle of a fine vineyard three miles from Lyons".
[1] The family were good friends of Alexander Pope and Stephen Hales, respectively.