|The House of Oldenburg Dynasty Tree|
|The Grand Duchy of Oldenburg|
|Adolf Frederick, King of Sweden|
|The Kingdom of Greece, showcasing the expansion of the state during the late 1800s and early 1900s|
|George I, King of the Hellenes (Greece)|
As an interesting aside, the House of Mountbatten, which will begin ruling the United Kingdom upon the death of Elizabeth II, is a cadet branch of the Greek Oldenburgs. Andrew married Princess Alice of Battenberg but the two became estranged after years of Andrew serving in the Greek army during World War I. Their only son, Philip, took the name Mountbatten due to anti-German sentiment in World War II and later married Princess Elizabeth prior to her elevation as Queen Elizabeth II of the United Kingdom.
As you can see, the Oldenburg family is quite vast. This and the previous two weeks have established the breadth of the family, and I in no way covered everything. The family ruled over many different lands throughout their rather short existence, and the future seems quite bright for them. Denmark and Norway still retain Oldenburg monarchs while Britain will soon have one of its own. Meanwhile, Russia and Greece both have rather large pro-royal movements that have gained momentum in recent years. The future for the Oldenburgs seems bright indeed.