John Louis I, Prince of Anhalt-Dornburg
John Louis I, Prince of Anhalt- Dornburg( 4 May 1656, in Zerbst – 1 November 1704, in Dornburg), was a German prince of the House of Ascania and ruler of the principality of Anhalt- Dornburg.
He was the sixth( but fourth surviving) son of John VI, Prince of Anhalt- Zerbst, by his wife Sophie Auguste, daughter of Frederick III, Duke of Schleswig- Holstein- Gottorp.
Christian I, Prince of Anhalt-Bernburg
Christian I, Prince of Anhalt-Bernburg, also known as Christian of Anhalt, (11 May 1568 – 17 April 1630) was a German prince of the House of Ascania.
He was ruling prince of Anhalt and, from 1603, ruling prince of the revived principality of Anhalt-Bernburg.
From 1595 he was governor of Upper Palatinate, and soon became the advisor-in-chief of Frederick IV, Elector Palatine.
Otto IV, Prince of Anhalt-Bernburg
Otto IV, Prince of Anhalt- Bernburg( died 1 May 1415) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Bernburg.
He was the youngest son of Otto III, Prince of Anhalt- Bernburg, by his unknown first wife.
John Louis II, Prince of Anhalt-Zerbst
John Louis II, Prince of Anhalt- Zerbst( 23 June 1688, in Dornburg – 5 November 1746, in Zerbst), was a German prince of the House of Ascania and ruler of the principality of Anhalt- Dornburg.
After 1742 he became ruler over the principality of Anhalt- Zerbst.
He was the eldest son of John Louis I, Prince of Anhalt- Dornburg, by his wife Christine Eleonore of Zeutsch.
Bernhard III, Prince of Anhalt-Bernburg
Bernhard III, Prince of Anhalt- Bernburg( died 20 August 1348) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Bernburg.
He was the eldest son of Bernhard II, Prince of Anhalt- Bernburg, by his wife Helene, daughter of Wizlaw II, Prince of Rügen.
Albert IV, Prince of Anhalt-Köthen
Albert IV, Prince of Anhalt- Köthen( d. Coswig, 24 November 1423), was a German prince of the House of Ascania and ruler of the principality of Anhalt- Zerbst until 1396, when he became the first ruler of the principality of Anhalt- Köthen.
He was the second son of John II, Prince of Anhalt- Zerbst, by his wife Elisabeth, daughter of John I, Count of Henneberg- Schleusingen.
William Louis, Prince of Anhalt-Harzgerode
William Louis of Anhalt-Harzgerode (Harzgerode, 18 August 1643 – Harzgerode, 14 October 1709), was a German prince of the House of Ascania and the last ruler of the principality of Anhalt-Harzgerode.
He was the eldest child and only son of Frederick, Prince of Anhalt-Harzgerode, by his first wife Johanna Elisabeth, daughter of John Louis, Prince of Nassau-Hadamar.
Elisabeth Charlotte of Anhalt-Harzgerode
Elizabeth Charlotte of Anhalt- Harzgerode( 11 February 1647 – 20 January 1723) was a Princess of Anhalt- Harzgerode by birth and by marriage Princess of Anhalt- Köthen and later Duchess of Schleswig- Holstein- Sonderburg- Norburg.
William Louis, Prince of Anhalt-Köthen
William Louis of Anhalt- Köthen( 3 August 1638, in Köthen – 13 April 1665, in Köthen), was a German prince of the House of Ascania and ruler of the principality of Anhalt- Köthen.
He was the second son of Louis I, Prince of Anhalt- Köthen, but second- born son of his second wife Sophie, daughter of Simon VI, Count of Lippe.
Frederick, Prince of Anhalt-Harzgerode
Frederick of Anhalt-Harzgerode (16 November 1613, Ensdorf, Bavaria – 30 June 1670, Plötzkau), was a German prince of the House of Ascania and the first ruler of the principality of Anhalt-Harzgerode.
He was the fourth (but third surviving son) of Christian I, Prince of Anhalt-Bernburg, by his wife Anna of Bentheim-Tecklenburg, daughter of Arnold III, Count of Bentheim-Steinfurt-Tecklenburg-Limburg.
In fact, he was the youngest son of his parents who survived into adulthood: his younger brother, Frederick Louis, born in 1619, died in infancy.

Question: When did William Louis, Prince Of Anhalt-Harzgerode's father die?
Answer: 30 June 1670