The name "United Kingdom of Great Britain and Northern Ireland" was adopted following the independence of the Irish Free State, and the partition of Ireland, in 1922, which left Northern Ireland as the only part of the island of Ireland within the UK.
The name "United Kingdom of Great Britain and Northern Ireland" was adopted by the Royal and Parliamentary Titles Act 1927. It reflected the independence of the Irish Free State, and the partition of Ireland, in 1922, which left Northern Ireland as the only part of the island of Ireland within the UK.