Adolphus XI of Schauenburg, as Adolph I Duke of Schleswig, and as Adolph VIII Count of Holstein-Rendsburg, was the mightiest vassal of the Danish realm. Wikipedia
Born: 1401
Died: December 4, 1459 (age 58 years), Lübeck, Germany
Great-grandparents: Gerhard III, Count of Holstein-Rendsburg, Euphemia of Sweden, Sophia of Brandenburg, and more