[1] Londesborough was born in 1834, the eldest son and heir of Lord Albert Conyngham, and Hon.

[2] His mother was the fourth daughter of Cecil Weld-Forester, 1st Baron Forester, and Lady Katharine Mary Manners (second daughter of Charles Manners, 4th Duke of Rutland) Among his siblings was Rear Admiral Albert Denison Somerville Denison (1835–1903).

Londesborough was the first President of the British Goat Society, established in 1869,[4] and was also Worshipful Master of the Constitutional Lodge No.

[8] Together, they were the parents of:[3] Lord Londesborough died in April 1900, aged 65, and was succeeded in his titles by his son William.

[11] Londesborough's arms are blazoned Ermine, a bend azure cotised sable between a unicorn's head erased in chief and a cross crosslet fitchée in base gules[12]