Sohn von Algernon Percy, 10th Earl of Northumberland; seit 1661 Mitglied der Honourable Society of the Inner Temple; seit 1668 11th Earl of Northumberland
Josceline Percy, 11th Earl of Northumberland (1644-1670). Provenance: accepted by HM Treasury, 1956, in lieu of death duties on the estate of Charles Henry Wyndham, 3rd Baron Leconfield, of Petworth House; transferred to the National Trust [Peter Lely / Art UK -- Public domain -- http://commons.wikimedia.org/wiki/File:JoscelinePercy 11thEarlOfNorthumberland BySirPeterLely PetworthHouse.jpg]