Wie trouwde met Magnus, Duke of Holstein?

Magnus of Denmark or Magnus of Holstein (5 September [O.S. 26 August] 1540 – 28 March [O.S. 18 March] 1583) 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.

Maria Vladimirovna of Staritsa (c. 1560 in Staritsa – 13 May 1610) was a Russian princess.