Question: This man was the Deputy Earl Marshal to the third British monarch of the House of Hanover.

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Earl of Suffolk: Earl of Suffolk is a title that has been created four times in the Peerage of England.  The first creation, in tandem with the creation of the title of Earl of Norfolk, came before 1069 in favour of Ralph the Staller; but the title was forfeited by his heir, Ralph de Guader, in 1074.  The second creation came in 1337 in favour of Robert de Ufford; the title became extinct on the death of his son, the second Earl, in 1382.  The third creation came in 1385 in favour of Michael de la Pole.  For more information on this creation, see the Duke of Suffolk (1448 creation).  The fourth creation came in 1603.  Lord Thomas Howard was the second son of Thomas Howard, 4th Duke of Norfolk, by his second marriage to Margaret, daughter and heiress of the Thomas Audley, 1st Baron Audley of Walden.  Howard was a prominent naval commander and politician and served as Earl Marshal, as Lord Chamberlain of the Household and as Lord High Treasurer.  In 1597 he was summoned to Parliament in right of his mother as Baron Howard de Walden, and in 1603 he was further honoured when he was created Earl of Suffolk.  His second son the Hon. Thomas Howard was created Earl of Berkshire in 1626.

Duke of Norfolk: The Duke of Norfolk is the premier Duke in the peerage of England, and also, as Earl of Arundel, the premier Earl.  The Duke of Norfolk is, moreover, the Earl Marshal and hereditary Marshal of England.  The seat of the Duke of Norfolk is Arundel Castle in Sussex, although the title refers to the county of Norfolk.  The current Duke of Norfolk is Edward Fitzalan-Howard, 18th Duke of Norfolk.  The dukes have historically been Catholic, a state of affairs known as recusancy in England.

Knight Marshal: The Knight Marshal is a former office in the British Royal Household established by King Henry III in 1236.  The position later became a Deputy to the Earl Marshal from the reign of Henry VIII until the office was abolished in 1846 .

George III of the United Kingdom: George III (George William Frederick; 4 June 1738 – 29 January 1820) was King of Great Britain and Ireland from 25 October 1760 until the union of the two countries on 1 January 1801, after which he was King of the United Kingdom of Great Britain and Ireland until his death.  He was concurrently Duke and prince-elector of Brunswick-Lüneburg ("Hanover") in the Holy Roman Empire until his promotion to King of Hanover on 12 October 1814.  He was the third British monarch of the House of Hanover, but unlike his two predecessors, he was born in Britain, spoke English as his first language, and never visited Hanover.

Lord Henry Howard-Molyneux-Howard: Lord Henry Thomas Howard-Molyneux-Howard (7 October 1766 – 17 June 1824), known as Henry Howard until 1812 as Henry Molyneux-Howard until 1817, was a British gentleman who served as Deputy Earl Marshal in the latter part of the reign of George III and early in the reign of George IV.  On the inheritance of the Dukedom of Norfolk in 1815 by his elder brother Bernard Howard, 12th Duke of Norfolk, Henry Molyneux-Howard in 1817 was granted the courtesy title "Lord", the style of a younger son of a duke.

Earl of Norfolk: Earl of Norfolk is a title which has been created several times in the Peerage of England.  Created in 1070, the first major dynasty to hold the title was the 12th and 13th century Bigod family, and it then was later held by the Mowbrays, who were also made Dukes of Norfolk.  Due to the Bigods' descent in the female line from William Marshal, they inherited the hereditary office of Earl Marshal, still held by the Dukes of Norfolk today.  The present title was created in 1644 for Thomas Howard, 18th Earl of Arundel, the heir of the Howard Dukedom of Norfolk which had been forfeit in 1572.  Arundel's grandson, the 20th Earl of Arundel and 3rd Earl of Norfolk, was restored to the Dukedom as 5th Duke upon the Restoration in 1660, and the title continues to be borne by the Dukes of Norfolk.

Lord High Constable of England: The Lord High Constable of England is the seventh of the Great Officers of State, ranking beneath the Lord Great Chamberlain and above the Earl Marshal.  His office is now called out of abeyance only for coronations.  The Lord High Constable was originally the commander of the royal armies and the Master of the Horse.  He was also, in conjunction with the Earl Marshal, president of the Court of Chivalry or Court of Honour.  In feudal times, martial law was administered in the court of the Lord High Constable.

Maltravers Herald Extraordinary: Maltravers Herald of Arms Extraordinary is a current officer of arms extraordinary in England.  As such, Maltravers is a royal herald, but is not a member of the College of Arms in London.  The present office was created in 1887 by the Earl Marshal, who was also the Duke of Norfolk and Baron Maltravers.  The office is known to have been held by a pursuivant to Lord Maltravers when he was deputy of Calais from 1540 to 1544.  The badge is blazoned as "A Fret Or".  It was officially assigned in 1973, though it had been assumed by two Maltravers Heralds in the 1930s.  It derives from the coat of arms of Maltravers "Sable a Fret Or and a Label of the points Ermine", and was the badge of John, Earl of Arundel through which family the barony passed to the Howard dukes of Norfolk.

Herald Chancellor of Canada: The Herald Chancellor of Canada ("Chancelier d'armes" in French) is an officer at the Canadian Heraldic Authority.  The office is always filled by the Secretary to the Governor General.  The Herald Chancellor is responsible for the administration of the entire vice-regal office.  In some ways, the office is analogous to the Earl Marshal in England, as it is the Herald Chancellor that issues the warrants permitting the Chief Herald of Canada to make grants of arms.  The Herald Chancellor also signs each completed grant document along with the Chief Herald.  The position of Deputy Herald Chancellor ("Vice-chancelier d'armes" in French) is held by the Deputy Secretary to the Governor General, who is also the head of the Chancellery of Honours, responsible for the administration of the Canadian honours system.  When the Herald Chancellor is unavailable, the Deputy Herald Chancellor will issue the proper warrants for the Chief Herald of Canada to grant arms.

Anselm Marshal: Anselm Marshal (died 23 December 1245) was the youngest and last of the five sons of William Marshal.  Had he lived longer, he would have become Earl of Pembroke and Earl Marshal upon the death of his brother Walter on 24 November 1245.  Since he only survived his brother a month, he was never confirmed in the earldom.  He died at Chepstow Castle and was buried in Tintern Abbey.

Supporting paragraphs: Lord Henry Howard-Molyneux-Howard George III of the United Kingdom
Answer: Lord Henry Thomas Howard-Molyneux-Howard