Claim: Magnus of Livonia (also known as Magnus, Duke of Holstein) was the Bishop of Courland from 1560 to 1583; he was also King of Livonia, crowned by Ivan IV in 1570.
Evidence: As a vassal of Tsar Ivan IV of Russia, he was the titular King of Livonia from 1570 to 1578. 1560–1583 During the Livonian War, on 10 June 1570, Duke Magnus arrived in Moscow, where he was crowned King of Livonia by Ivan IV.