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 present surname of the British royal family is Windsor. They are known as the house of Windsor.
The current British royal house is the House of Windsor.
Windsor. The UK Royal Family adopted the name Windsor by a royal proclamation of George V in 1917
There are several "royal families" in the world. Each has a different surname. The family name of the British Royal Family is Windsor.
The House of Windsor.
The surname of the British royal family is Windsor. It was adopted by King George V in 1917, replacing the German name Saxe-Coburg and Gotha, due to anti-German sentiment during World War I. In 1960, Queen Elizabeth II decided that her direct descendants would bear the surname Mountbatten-Windsor, combining her own surname with that of her husband, Prince Philip.
In 1917, World War I was in full swing. Naturally, the British people did not like Germany. But, the German Royal family mixed quite frequently, so the British Royal family were a branch of the House of Saxe-Coburg and Gotha. Many people did not like this as it represented a tie between the two battling countries. So, to show that the British Royals were seperate, King George broke off the Saxe-Gotha family and created his own new house: the House of Windsor. Windsor is a much more British-sounding name, so it made people in England happy.
The royal family's SURname is Windsor.
Windsor Castle is a Royal residence of British Royal family in Berkshire, England. It was under siege for a long time during the First Barons war (1215-1217).
An example of a royal country would be the United Kingdom. Its royal family is the Windsor Family.
The Royal Family