Prince Axel of Denmark was a cousin of the King of Greece, who ruled during what years?
Prince Axel of Denmark: Prince Axel Christian Georg of Denmark, {'1': ", '2': ", '3': 'RE, SKmd', '4': "} (Danish: "Prins Axel Christian Georg til Danmark"; 12 August 1888 in Copenhagen – 14 July 1964 in Copenhagen) was a Danish prince and a grandson of Christian IX of Denmark On his father's side, he was a first cousin of Christian X of Denmark, Haakon VII of Norway, Constantine I of Greece, George V of the United Kingdom, Nicholas II of Russia, Maud of Wales and Ernest Augustus III, Duke of Brunswick and on his mother's side of Henri, Count of Paris (1908–1999), Orleanist pretender to the French throne. Constantine I of Greece: Constantine I (Greek: Κωνσταντῖνος Α΄ , "Konstantínos I"; 2 August [O.S. 21 July] 1868 – 11 January 1923) was King of Greece from 1913 to 1917 and from 1920 to 1922.
1913 to 1917 and from 1920 to 1922