This is a list of the monarchs of Great Britain an the United Kingdom. The Kingdom of Great Britain was formed on 1 May 1707 with the merger of the Kingdom of England and the Kingdom of Scotland, which had been in personal union under the House of Stuart since 24 March 1603. On 1 January 1801 Great Britain merged with the Kingdom of Ireland to form the United Kingdom of Great Britain and Ireland. After most of Ireland left the union on 6 December 1922, on 12 April 1927 its name was amended to the United Kingdom of Great Britain and Northern Ireland.