Casimir IV was a duke of Pomerania in Pomerania-Stolp since 1374. Wikipedia
Born: 1351
Died: January 2, 1377 (age 26 years), Bydgoszcz, Poland
Spouse: Margaret of Masovia (m. 1369)
Grandparents: Casimir III the Great, Wartislaw IV, Duke of Pomerania, Aldona of Lithuania, and more
Great-grandparents: Bogislaw IV, Duke of Pomerania, Władysław I Łokietek, Gediminas, and more