Joachim Ernest, Duke of Schleswig-Holstein-Sonderburg-Plön
Member of the House of Oldenburg
Joachim Ernest of Schleswig-Holstein-Sonderburg-Plön, also Joachim Ernest of Schleswig-Holstein-Plön, was the first Duke of Schleswig-Holstein-Sonderburg-Plön, which emerged from a division of the Duchy of Schleswig-Holstein-Sonderburg. Wikipedia
Born: August 29, 1595, Sønderborg, Denmark
Died: October 5, 1671 (age 76 years), Plön, Germany
Great-grandparents: Frederick I of Denmark, Anna of Brandenburg, Christoph, Duke of Württemberg, and more
Partner: Dorothea Augusta of Schleswig-Holstein-Gottorp (1633–)