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.
Hanoverian prince This is a list of Hanoverian princes from the accession of George III to the throne of the Kingdom of Hanover in 1814. Individuals holding the title of prince will usually also be styled "His Royal Highness" (HRH). The wife of a Hanoverian prince will usually take the title and style of her husband. Despite Hanover's annexation by Prussia in 1866, male-line descendants of George III continue to style themselves as a prince or princess of Hanover.