The ducal line of Schleswig-Holstein-Sonderburg-Plön-Rethwisch descended from the line of

Schleswig-Holstein-Sonderburg-Plön The Duchy of Schleswig-Holstein-Sonderburg-Plön (german: Herzogtum Schleswig-Holstein-Sonderburg-Plön), also ''Schleswig-Holstein-Plön'', ''Holstein-Plön'' or just ''Duchy of Plön'', was a small sub-duchy (''Teilherzogtum'') created by the p ...

. It was founded by Joachim Ernest II (born 5 October 1637; died 5 October 1700) who as the third son of the Duke of Plön, Joachim Ernest, received the estate of

Rethwisch Rethwisch or Rehtwisch may refer to: Places * Rethwisch, Stormarn, a municipality in the Stormarn district, Schleswig-Holstein * Rethwisch, Steinburg, a municipality in Steinburg district, Schleswig-Holstein * Rethwisch, a village in the municip ...

in Stormarn as his inheritance. He was a general to the Spanish royal house in the Netherlands and became a Roman Catholic in 1673. The line laid claim to the domain of Plön; this was rejected however by the King of Denmark. John Ernest Ferdinand (born 4 December 1684; died 21 May 1729) appealed to the Supreme Court and was vindicated. He died without leaving living descendants.

List of dukes

Sources

* Schleswig-holsteinische Blätter für 1835- 0

German noble families Sonderburg-Plon-Rethwisch * {{SchleswigHolstein-geo-stub