Princess Marie Louise of Hanover and Cumberland (11 October 1879 – 31 January 1948) was the eldest child of Ernest Augustus, Crown Prince of Hanover, and Princess Thyra of Denmark, the youngest daughter of Christian IX of Denmark and Louise of Hesse-Kassel. Through her father, Marie Louise was a great-great-granddaughter of George III of the United Kingdom and Charlotte of Mecklenburg-Strelitz. She was a first cousin of Nicholas II of Russia, Constantine I of Greece, Christian X of Denmark, Haakon VII of Norway and Queen Maud of Norway and George V of the United Kingdom.

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Quick Facts Born, Died ...

Princess Marie Louise
Margravine of Baden
Born	(1879-10-11)11 October 1879 Gmunden, Upper Austria, Austria-Hungary
Died	31 January 1948(1948-01-31) (aged 68) Salem, Baden, Germany
Spouse	Prince Maximilian of Baden ​ ​ (m. 1900; died 1929)​
Issue	Marie Alexandra, Princess Wolfgang of Hesse Berthold, Margrave of Baden
Names Marie Louise Victoria Caroline Amalie Alexandra Augusta Friederike
House	Hanover
Father	Ernest Augustus, Crown Prince of Hanover
Mother	Princess Thyra of Denmark

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Marie Louise married Prince Maximilian of Baden (1867–1929), her third cousin twice removed, on 10 July 1900 in Gmunden, Austria-Hungary. He was the son of Prince Wilhelm of Baden and his wife Princess Maria Maximilianovna of Leuchtenberg and became a first cousin twice removed of Napoleon III of France. Marie Louise and Maximilian had one daughter and one son:

• Princess Marie Alexandra of Baden (1 August 1902 – 29 January 1944). Married Prince Wolfgang Moritz of Hesse-Kassel, a son of Prince Frederick Charles of Hesse-Kassel and Princess Margaret of Prussia. Marie Alexandra was killed in a bombing of Frankfurt by the Allies of World War II.
• Berthold, Margrave of Baden (24 February 1906 – 27 October 1963). Married Princess Theodora of Greece and Denmark, a daughter of Prince Andrew of Greece and Denmark and Princess Alice of Battenberg. Prince Berthold was the brother-in-law of Philip, Duke of Edinburgh.