This man was the Deputy Earl Marshal to the third British monarch of the House of Hanover.
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.
Deputy crown prince Deputy crown prince is a royal political position, being the third man in the kingdom. The holder of the position becomes crown prince in the event of the absence of the crown prince, and the king of the country in the event of vacant posts of the King and the Crown Prince at the same time. The position is known in Saudi Arabia, as a key position. There are also other designations, such as the Second Deputy Premier, Second Deputy Prime Minister and Mandate of the mandate of the Covenant.