Iceland: Heads of State: 1918-1944 Royal house: Glücksborg Af guðs náð konungur Íslands og Danmerkur, Vinda og Gauta, hertogi í Slésvík, Holtsetalandi, Stórmæri, Þéttmerski, Láenborg og Aldinborg | By the Grace of God, King of Iceland and Denmark, the Wends and the Goths, Duke of Schleswig, Holstein, Stormarn, Dithmarschen, Lauenburg and Oldenburg 1 Dec 1918 - 16 Jun 1944 Christian 10. (Christian Carl Frederik Albert Alexander Vilhelm) [1][2] [1] Also in Denmark. [2] Royal authority was exercised by the Regents (10 Apr 1940 - 16 Jun 1944). Last updated on: 03 Dec 2023; URL: www.archontology.org/nations/iceland/00_1918_44_s.php