| Country | Sovereign | Born | Acceded | Consort (born) | Heir (born) |
 Kingdom of Norway |  King Haakon VII | 3 Aug 1872 | 18 Nov 1905 (exiled 1940-45) |  Crown Prince Olav (1903) | |
 Kingdom of Sweden |  King Gustaf V | 16 Jun 1858 | 8 Dec 1907 |  Crown Prince Gustaf Adolf (1882) | |
 Grand Duchy of Luxembourg |  Grand Duchess Charlotte | 23 Jan 1896 | 14 Jan 1919 (exiled 1940-45) |  Prince Felix (1893) |  Her. Grand Duke Jean (1921) |
 Principality of Monaco |  Prince Louis II | 12 Jul 1870 | 27 Jun 1922 |  Prince Rainier (1923) | |
 Kingdom of Belgium |  King Leopold III | 3 Nov 1901 | 23 Feb 1934 |  Prince Baudouin, Duke of Brabant (1930) | |
 United Kingdom of Great Britain and Northern Ireland Ireland |  King George VI | 14 Dec 1895 | 11 Dec 1936 |  Queen Elizabeth (1900) |  Princess Elizabeth (1926) |
 Principality of Liechtenstein |  Prince Franz Joseph II | 16 Aug 1906 | 25 Jul 1938 |  Princess Georgina (1921) | Her. Prince Hans Adam (1945) |
 Kingdom of Greece |  King Paul I | 14 Dec 1901 | 1 Apr 1947 |  Queen Frederica (1917) | Crown Prince Constantine (1940) |
 Kingdom of Denmark |  King Frederik IX | 11 Mar 1899 | 20 Apr 1947 |  Queen Ingrid (1910) |  Prince Knud (1900) |
 Kingdom of the Netherlands |
 Queen Juliana | 30 Apr 1909 | 4 Sept 1948 |  Prince Bernhard (1911) | Princess Beatrix (1938) |