Career
Summoned to parliament in 1388, FitzHugh became active in public affairs following Henry IV"s succession. At the coronation of Henry V in 1413, FitzHugh was Constable. During Henry"s reign, he served as Chamberlain of the Household (1413–1425, into the reign of Henry VI), and Treasurer of England (1416–1421).
He participated in the Battle of Agincourt in 1415 and subsequent diplomacy with the French, which led to the Treaty of Troyes in 1420.
He travelled with the king to France, and he escorted the king"s remains back to England following his death in 1422. He was an executor of Henry"s will and was a feoffee of lands in the will.
He became a Knight of the Garter about 1409. After his death on 11 January 1425, FitzHugh was buried at Jervaulx Abbey in Yorkshire at his request.
During his travels to the Scandinavian Peninsula in 1406, he visited the Bridgettine Vadstena Abbey in Sweden, where he volunteered to help establish a Bridgettine community in England, including the promise of a manor at Cherry Hinton in Cambridgeshire.
An English order was established in 1415 at Twickenham with the assistance of Henry V. He also attended the Council of Constance in 1415. A descendant of Akarius Fitz Bardolph, FitzHugh was the first son of Hugh FitzHugh, 2nd Baron FitzHugh, and Joan, daughter of Henry Scrope, 1st Baron Scrope of Masham. Robert was a son of John de Grey, 1st Baron Grey de Rotherfield and Avice Marmion (a descendant of John, King of England).
William FitzHugh, 4th Baron FitzHugh, married to Margery Willoughby, daughter of William Willoughby, 5th Baron Willoughby de Eresby.
Robert FitzHugh, Bishop of London
Eleanor married secondly to Thomas Tunstall and thirdly to Henry Bromflete, 1st Baron Vesci. Elizabeth FitzHugh, married firstly on 10 December 1427 to Sir Ralph Gray of Chillingham (d17 March 1442/3) and secondly, in 1445, Sir Edmund Montfort.
Elizabeth was a lady-in-waiting to queen consort Margaret of Anjou. Maud FitzHugh, wife of Sir William Eure of Witton.