[2] He was the grandfather of Admiral Sir Reginald Aylmer Ranfurly Plunkett-Ernle-Erle-Drax, KCB, DSO, JP, DL.
He served as a midshipman in the boats of the 48-gun HMS Sybille (1794), commanded by Captain Samuel John Brooke Pechell, in a severe action with the pirates in the Greek archipelago in 1826.
Randall married Elizabeth Evelyn in 1838, but the couple had no children, leaving his brother Edward as the presumptive heir.
[8] After leaving active service, he was promoted on the Navy's reserved half-pay list to Rear-Admiral on 12 November 1864 and to Vice-Admiral on 14 July 1871.
[13] and lectured at the United Services Institution in February 1878 on "The Laws of Warfare as Limiting the use of fireships, explosion-vessels, torpedoes, and mines.
[15] Admiral Lord Dunsany died at his home in Hastings, Kent, on 22 February 1889 at the age of 80 and was buried at Copthorne, West Sussex.
Captain Plunkett, R.N., he translated from French the two-volume work by Captain Edmond Jurien de La Gravière, French Navy, Guerres Maritimes sous la Républic et L'Empire (Paris, 1847) as Sketches of the Last Naval War (London, 1848).