Anhalt-Plötzkau was a principality located in Germany. It has been created on two occasions. It was created for a first time in 1544 following the partition of Anhalt-Dessau but the principality ceased to exist following the death of Prince George III in 1553 at which point it was inherited by the prince of Anhalt-Zerbst.
It was created for a second time in 1603 with the partition of the unificated principality of Anhalt; this time, in order to create a bigger principality, parts of Anhalt-Bernburg were extracted. This second incarnation lasting until 1665 at which point Prince Lebrecht succeeded as Prince of Anhalt-Köthen and Plötzkau returned to the principality of Anhalt-Bernburg.
George III 1544–1553
Principality of Anhalt-Plötzkau Wikipedia
To Anhalt-Zerbst 1553.Augustus 1603–1653
Ernest Gottlieb 1653–1654
Lebrecht 1653–1665 (co-regent)
Emmanuel 1653–1665 (co-regent)
United with Anhalt-Bernburg 1665.