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.
- Occupation
- aristocrat
- Citizenship
- Kingdom of Denmark
- Born
- August 29, 1595
- Died
- October 5, 1671
