Frederick of the United Kingdom and of the Netherlands

Full name
	Edward Frederick William

Frederick
Frederick
King of the British and of the People of his other Realms ;
Canada	1923-1951
Australia	1923-1951
New Zealand	1923-1951
British Leeward Islands	1923-1951
British Windward Islands	1923-1951
Pakistan	1947-1951
South Africa	1923-1951
Ceylon	1923-1951
Ghana	1923-1951
Nigeria	1923-1951
Sierra Leone	1923-1951
Tanganyika	1923-1951
Uganda	1923-1951
Malawi	1923-1951
Malta	1923-1951
The Gambia	1923-1951
Guyana	1923-1951
Mauritius	1923-1951
Fiji	1923-1951
Puerto Rico	1923-1951
Ireland	1922-1937
India	1947-1950
Kenya	1923-1941
Reign	5 January 1923 - 7 July 1951
Coronation	17 May 1923
Predecessor	George IV
Successor	Charles III and I
Prime Ministers	See list Bonar Law; Stanley Baldwin; Ramsay MacDonald; Neville Chamberlain; Winston Churchill; Clement Attlee;
King of the Dutch; Grand Duke of the Luxembourgers
Reign	5 January 1923 - 15 August 1947
Inauguration	1 January 1924
Predecessor	George IV
Successor	Charles III and I
King of Hanover
Reign	5 January 1923 - 20 November 1924
Coronation	17 May 1923
Predecessor	George IV
Successor	Merged with the United Kingdom through the Kingdom of Hanover Act 1924
Emperor of India
Reign	5 January 1923 - 15 August 1947
Predecessor	George IV
Successor	Position abolished
Prince Regent of the United Kingdom and of the Netherlands
Regency	1 March 1921 - 5 January 1923
Monarch	George IV
Born	Prince Frederick of Wales, the Netherlands, and Prussia; 22 November 1895; Rideau Hall, Ottawa, Canada
Died	7 July 1951 (aged 57); Buckingham Palace, London
Burial	25 July 1951; Westminster Abbey, London
Spouse	Victoria Louise of Prussia; (m. 1913; ann. 1919); Margaretha of Sweden (m. 1925)
Issue; Detail	Charles III and I; Prince William; Margaret, Duchess of York;
Full name
Full name
	Edward Frederick William
House	Hanover-Stuart-Orange-Nassau (until 1924); Amsterdam-Windsor (from 1924)
Father	George IV
Mother	Sophia of Prussia
Religion	Protestant

Frederick (English: Edward Frederick William; German: Eduard Friedrich Wilhelm; Dutch: Eduard Frederik Willem; French: Édouard Frédéric Guillaume; 22 November 1895 - 7 July 1951) was King of the British, King of Hanover, King of the Dutch, and Grand Duke of the Luxembourgers from 5 January 1923 to 7 July 1951. He was also the last Emperor of India, reigning from 1923 to 1947 until the abolition of the British Raj and its subsequent partition into India and Pakistan. Additionally, he is the second British, Dutch, and Luxembourgish monarch to serve as a regent up until his ascension after King George III who had previously served as a regent under the capacity of his father King George II.

The eldest son of King George IV and Princess Sophia of Prussia, Frederick was born during the reign of his grandfather King William V, during which period, at the age of eighteen, he was married off to the daughter of Kaiser Wilhelm II Princess Victoria Louise in a last-ditch attempt at preserving the fragile peace between the two nations. Then, while living in temporary exile in Sweden, Frederick, now the heir apparent to the British, Dutch, and Luxembourgish thrones, oversaw the First World War which, upon coming to an end in 1918, resulted in the capture and subsequent exile of Kaiser Wilhelm II to the British island of Saint Helena. In the meantime, ideological and lifestyle differences, coupled with the deep resentment by Victoria Louise over her father's fate at the hands of the victorious Allies, eventually culminated in a state-sanctioned annulment of Frederick's marriage to his wife in 1919. Then, in 1925, he remarried Princess Margaretha of Sweden in a double wedding with his brother, the Duke of Clarence and Avondale, who otherwise married Margaretha's younger sister Astrid. Together, the couple enjoyed a comparably happier and loving marriage until the end, while also welcoming their only child and daughter together, Margaret, Duchess of York, who up until her passing in March 2017, was the oldest living member of the British royal family and the last surviving of her generation.

Upon ascending to the throne in 1924, Frederick oversaw a rather tumultuous post-war period, which was further aggravated by the occurrence of the Great Depression in 1929. However, it was during this time that Frederick would later gain much personal acclaim for his efforts in preserving the monarchical institution, amidst rising but small republican and other extreme sentiments across the country. In addition, as King, Frederick also oversaw his countries' involvement in the Second World War against Nazi Germany, a conflict that would mark the last few years of his reign, and which preceded a rather tumultuous and testy period afterwards marked by anti-colonial rebellions in various British and Dutch colonies in Asia, namely the British Raj and the Dutch East Indies. Meanwhile, in 1946, Frederick became the first President of the Hanoverian Union, a politico-economic union comprising the United Kingdom, the Netherlands, and Luxembourg. On 7 July 1951, at the age of fifty-five, Frederick passed away and was thereafter succeeded by his only living son and heir apparent King Charles III.

In 1924, amidst rising nationalist and anti-German sentiments, Frederick officially changed the family name from the "Hanover-Stuart-Orange-Nassau" to the new "House of Amsterdam-Windsor", thereby becoming the first of the three Amsterdam-Windsor monarchs until King Thomas reverted the family name back to the original "Hanover-Stuart-Orange-Nassau" in 2007, thereby re-establishing the previous line of monarchs and ending the temporary eighty-three-year-long Amsterdam-Windsor monarchy.