>>1754733 (old bread)

Part 1:

This guy was German but married an Englishwoman and lived in London. Last male heir of the dynasty except for 2 guys in their 70s - little chance of them producing another heir (short of divorce and a new trophy wife).

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https://eurohistoryjournal.blogspot.com/2018/06/prince-georg-constantin-of-san-weimar.html

… HH Prince Georg-Gonstantin of Saxe-Weimar-Eisenach [1977-2018], last male heir to his family's ancient legacy. He suffered an accident on 9 June, near Apethorpe Palace, Northamptonshire, where he was participating in a riding contest. ( http://www.english-heritage.org.uk/visit/places/apethorpe-palace/ ) A report of the tragic accident mentioned that the Prince had died at the scene. … Georg-Constantin was the designated heir to the Grand Ducal Family as his cousin Prince Michael Benedict only has a daughter, Leonie, and she cannot succeed to Headship of House Saxe-Weimar-Eisenach. … Georg Constantin was approachable, kind, and interested in his family's historical role in developing Weimar's cultural legacy. His untimely death is a great tragedy, not just for his wife and parents, but also for the future of his dynasty. The two remaining male Saxe-Weimar-Eisenachs are both in their seventies. Prince Georg-Constantin is survived by his widow, Princess Olivia, his parents, sister and her family.

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https://www.thesun.co.uk/news/6528969/prince-georg-constantin-dead-fall-horse-aperthorpe-palace/

Prince Georg-Constantin was successor to the House of Wettin and his family is linked to many of Europe's Royal houses.

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http://www.dailymail.co.uk/news/article-5843681/German-prince-moved-UK-marry-Englishwoman-killed-falling-horse-race.html

[Prince Georg-Constantin's] uncle Michael [Michael Benedict, Head of House Saxe-Weimar-Eisenach] is in the succession line to the British throne as he is the great-great-great-great-great-grandson of King George's II's daughter Princess Augusta. According to German media, Prince Georg-Constantin would also have been next in line as successor to the throne in Germany if the Kingdom of Saxony had still existed. … A friend once joked that technically he out-ranked the Queen because his family is older than the UK Royal family.

>>1754733 (both old bread)

>>1756083

Part 2 of 3:

https://en.wikipedia.org/wiki/House_of_Wettin

The House of Wettin (German: Haus Wettin) is a dynasty of German counts, dukes, prince-electors and kings that once ruled territories in the present-day German states of Saxony, Saxony-Anhalt and Thuringia. The dynasty is one of the oldest in Europe, and its origins can be traced back to the town of Wettin, Saxony-Anhalt. The Wettins gradually rose to power within the Holy Roman Empire. Members of the family became the rulers of several medieval states, starting with the Saxon Eastern March in 1030. Other states they gained were Meissen in 1089, Thuringia in 1263, and Saxony in 1423.

The family divided into two ruling branches in 1485 by the Treaty of Leipzig: the Ernestine and Albertine branches. The older Ernestine branch played a key role during the Protestant Reformation. Many ruling monarchs outside Germany were later tied to its cadet branch [i.e., descended through somebody other than the first-born son], the House of Saxe-Coburg and Gotha. The Albertine branch, while less prominent, ruled most of Saxony and played a part in Polish history.

Agnates of the House of Wettin have, at various times, ascended the thrones of Great Britain, Portugal, Bulgaria, Poland, Saxony, and Belgium. Only the British and Belgian lines retain their thrones today. …

It was only in the 19th century that one of the many Ernestine branches, the House of Saxe-Coburg and Gotha, regained importance through marriages as the "stud of Europe", by ascending the thrones of Belgium (in 1831), Portugal (1853–1910), Bulgaria (1908–1946) and the United Kingdom (in 1901). …

From King George I to Queen Victoria, the British Royal family was variously called House of Hanover, being a junior branch of the House of Brunswick-Lüneburg and thus part of the dynasty of the Guelphs. In the late 19th century, Queen Victoria charged the College of Heralds in England to determine the correct personal surname of her late husband, Prince Albert of Saxe-Coburg and Gotha—and, thus, the proper surname of the royal family upon the accession of her son. After extensive research, they concluded that it was Wettin, but this name was never used, either by the Queen or by her son or grandson, King Edward VII and King George V; they were simply called "Saxe-Coburg-Gotha".

Severe anti-German sentiment during World War I led some influential members of the public quietly to question the loyalty of the Royal Family, because they had a German or German-sounding name. Advisors to King George V again searched for an acceptable surname for the British royal family, but Wettin was rejected as "unsuitably comic". By Order in Council, the name of the British royal family was legally changed to Windsor.

>>1754733 (both old bread)

>>1756083

>>1756194

Part 3 of 3:

https://en.wikipedia.org/wiki/House_of_Saxe-Coburg_and_Gotha

House of Saxe-Coburg and Gotha

The House of Saxe-Coburg and Gotha … is a German dynasty that ruled the duchy of Saxe-Coburg and Gotha, which was one of the Ernestine duchies. It is a cadet branch of the Saxon House of Wettin.

Founded by Ernest Anton, the sixth duke of Saxe-Coburg-Saalfeld, it has been the royal house of several European monarchies. Agnatic branches currently reign in Belgium through the descendants of Leopold I and in the United Kingdom and the other Commonwealth realms through the descendants of Prince Albert. Due to anti-German sentiment in the United Kingdom during World War I, George V changed the name of his branch from "Saxe-Coburg and Gotha" to "Windsor" in 1917. …

Patrilineality, descent as reckoned from father to son, had historically been the principle determining membership in reigning families until late in the 20th century, thus the dynasty to which the monarchs of the House of Saxe-Coburg-Gotha belonged genealogically throughout the 1900s is the House of Wettin, despite the official use of varying names by different branches of the patriline.

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https://en.wikipedia.org/wiki/Cadet_branch

A still more junior branch of the Wettins, headed by the rulers of the small Duchy of Saxe-Coburg and Gotha, would, through diplomacy or marriage in the 19th and 20th centuries, obtain the royal crowns of, successively, Belgium, Portugal, Bulgaria and the Commonwealth realms. Also, marriage to cadet males of the Houses of Oldenburg (Holstein-Gottorp), Polignac, and Bourbon-Parma brought those dynasties patrilineally to the thrones of Russia, Monaco, and Luxembourg, respectively. The Dutch royal house has, at different times, been a cadet branch of Mecklenburg and Lippe(-Biesterfeld). In the Commonwealth realms, Prince Philip, Duke of Edinburgh, and his male-line descendants are cadet members of the house of Glücksburg.