Christian X (Danish: Christian Carl Frederik Albert Alexander Vilhelm; 26 September 1870 – 20 April 1947) was King of Denmark from 1912 until his death in 1947, and the only King of Iceland as Kristján X, holding the title as a result of the personal union between Denmark and independent Iceland between 1918 and 1944.
He was a member of the House of Glücksburg, a branch of the House of Oldenburg, and the first monarch since King Frederick VII born into the Danish royal family; both his father and his grandfather were born as princes of a ducal family from Schleswig. Among his siblings was King Haakon VII of Norway. His son became Frederick IX of Denmark. Among his cousins were King George V of the United Kingdom, Emperor Nicholas II of Russia, and King Constantine I of Greece, while Queen Maud of Norway, was both his cousin and sister-in-law.
