Magnus, Duke of Holstein
Prince
Magnus of Denmark or Magnus of Holstein was a Prince of Denmark, Duke of Holstein, and a member of the House of Oldenburg. As a vassal of Tsar Ivan IV of Russia, he was the titular King of Livonia from 1570 to 1578. Wikipedia
Born: August 26, 1540, Copenhagen Castle, Copenhagen, Denmark
Died: March 28, 1583 (age 42 years), Copenhagen Castle, Copenhagen, Denmark
Parents: Christian III of Denmark and Dorothea of Saxe-Lauenburg
Spouse: Maria Vladimirovna of Staritsa (m. 1574)
Children: Eudoxia of Oldenburg and Maria of Oldenburg
Siblings: Frederick II of Denmark