Casimir IV, Duke of Pomerania
| Casimir IV, Duke of Pomerania | |
|---|---|
Seal of Casimir, reading "Kasimir, Dei Gra(tia) Dux Stetinensis, Dobrin, Pomoranie, Slavie, Casubie, Pr(inceps) in Rugie"
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| Spouse(s) |
Kenna of Lithuania Margaret of Masovia |
| Noble family | House of Griffins |
| Father | Bogislaw V, Duke of Pomerania |
| Mother | Elizabeth of Poland |
| Born | 1351 |
| Died | 2 January 1377 |
Casimir IV (Polish: Kazimierz IV or Kaźko Słupski,German: Kasimir IV or Kasimir V ) (1351 – January 2, 1377) was a duke of Pomerania in Pomerania-Stolp since 1374.
Casimir was the son of Bogislaw V, Duke of Pomerania and Elizabeth of Poland. His maternal grandfather Casimir III the Great, the last king of Poland from the Piast dynasty, had no sons and brought him up at his court. After his grandfather's death in 1370, young Casimir initially became his partial successor, as the last will gave him lands of Dobrzyń, Bydgoszcz, Kruszwica, Złotów and Wałcz as fiefs. Yet, his ambitions were soon thwarted by Louis I of Hungary, who became the next king of Poland on the grounds of earlier pacts, and nullified the Piast's last will. Duke Casimir only held the land of Dobrzyń as a temporary fief.
In 1360, Casimir married his first wife Kenna of Lithuania. She was the daughter of Algirdas and Uliana Alexandrovna of Tver, raised in the Eastern Orthodox faith. With her marriage, she joined the Roman Catholic Church and was baptised again under the name "Johanna". She died on 27 April 1368, leaving no children.
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