November 18, 1661 – Birth of Elisabeth Henriëtte of Hesse-Kassel, wife of King Friedrich I of Prussia, in Kassel (Germany)
Wikipedia: Elisabeth Henriëtte of Hesse-Kassel
November 18, 1774 – Wilhelmine of Prussia, wife of King Willem I of the Netherlands, in Potsdam (Germany)
Unofficial Royalty: Wilhelmine of Prussia, Queen of the Netherlands
November 18, 1851 – Death of King Ernest Augustus I of Hanover, son of King George III of Great Britain, at Schloss Herrenhausen, Hanover, Germany; buried at the Chapel of Schloss Herrenhausen, Hanover
Ernest became king of Hanover upon the death of his brother William IV. Hanover had the Salic Law which forbids female succession. So while Victoria succeeded her uncle William on the British throne, she could not succeed to the Hanover throne. William’s next brother, Ernest did. The current Prince Ernst of Hanover is the senior direct male-line descendant of George III.
Unofficial Royalty: King Ernest Augustus I of Hanover
November 18, 1905 – Prince Carl of Denmark elected King of Norway, reigned as King Haakon VII
Carl was the son of King Frederick VIII of Denmark and was the nephew of King George I of Greece, Queen Alexandra of the United Kingdom and Empress Marie Feodorovna of Russia. Carl married his first cousin, Princess Maud, daughter of King Edward VII and Queen Alexandra of the United Kingdom.
Unofficial Royalty: King Haakon VII of Norway
November 18, 1940 – Birth of Sultan Qaboos bin Said of Oman in Salalah, Oman
Unofficial Royalty: Sultan Qaboos bin Said of Oman
November 18, 1995 – Wedding of Prince Joachim of Denmark and Alexandra Manley at the Frederiksborg Palace Church
The couple divorced in April 2005.
Unofficial Royalty: Prince Joachim of Denmark
Unofficial Royalty: Alexandra Manley, Countess of Frederiksborg