House of Windsor
The House of Windsor
, previously called the House of Saxe-Coburg-Gotha
), is the Royal House
of the United Kingdom of Great Britain and Northern Ireland
. The House was renamed Windsor on July 17
by King George V
during World War I
, on account of the German origins of the name, given that what was then United Kingdom of Great Britain and Ireland
was at war with Germany
The German name came via Queen Victoria's marriage to Prince Albert, son of Duke Ernst I of Saxe-Coburg-Gotha, in February 1840.
Some descendants of Queen Elizabeth II and her husband, Prince Philip, Duke of Edinburgh have the surname of Mountbatten-Windsor (through an Order-in-Council given in 1960).
See also: British Royal Family
List of Monarchs from the House of Windsor
Of the United Kingdom of Great Britain and Ireland:
Of the United Kingdom of Great Britain and Northern Ireland
and other Commonwealth Realms
 King George V's reign began in 1910 under the House of Saxe-Coburg-Gotha.
 Though the Irish Free State
left the United Kingdom in 1922, the actual name of the kingdom was not changed until 1927. From 1927, the monarch also became the king or queen of many Commonwealth Realms
, including Ireland
, New Zealand
, Union of South Africa
, etc. Prevously they had been monarchs in
those states, through a shared Crown of the British Empire. After 1927, it became a shared monarch
wearing multiple crowns.