Yes, 17th July 1917. They changed it at the height of the war. On the homefront in Britain, there was despisal towards anything that sounded German. German Shepherd's were changed to Alsatians, and the Royal family changed their name from Mountbatten to Windsor, because it sounded too German.
Windsor. The British royal family changed their last name from Saxe-Coburg und Gotha to Windsor in 1917, due to extremely strong anti-German sentiment after WW1 began in 1914.
Windsor
The present surname of the British royal family is Windsor. They are known as the house of Windsor.
George V's last name was Windsor. He was a member of the British royal family and held the title of King of the United Kingdom and the British Dominions from 1910 until his death in 1936.
Queen Elizabeth's surname was Windsor. Her family's surname was Saxe-Coburg-Gotha until 1917 when they changed it to Windsor to sound non-German (the British people were anti-German then as it was WWI). Members of the British Royal Family do not have surnames. They are the descendants of the house of Windsor but this is not the same as holding a surname. However, as you posted this Question in the "Elizabeth I" category I assume you mean the first Queen Elizabeth. Elizabeth I was a member of the House of Tudor but, as with Elizabeth II this does not constitute a surname
Answer: With the marriage of Victoria to the German prince, Albert, the name of the British royal family became Saxe-Coburg Gotha. Due to anti-German feeling during the First World War, the family name was changed, by royal proclamation, to that of Windsor in 1917. Although the name has changed, the family are still of German origin.
The current name of the British Royal Family is Windsor. If they are not in line to the throne immediately they are Mountbatten - Windsor or are issue if royal ladies then the second name applies
The current British royal house is the House of Windsor.
The House of Windsor.
George VI, born Albert Frederick Arthur George, was not German. He was a member of the British royal family, the House of Windsor. His family originally belonged to the House of Saxe-Coburg and Gotha but changed their name to Windsor during World War I due to anti-German sentiment.
During World War I the name of the British Royal family (more correctly the name of the Royal House) was changed from Saxe-Coburg Gotha to Windsor, because of anti-German sentiment during the war. While earlier periods of British history are referred to by the name of the monarch, for example, Victorian, Edwardian or Elizabethan, the expression "Windsor Era" is not generally used.