Anna Eleonore of Stolberg-Wernigerode
Anna Eleonore of Stolberg- Wernigerode( 26 March 1651- 27 January 1690), was a German regent; Princess of Anhalt- Köthen by marriage to Emmanuel, Prince of Anhalt- Köthen, and regent of Anhalt- Köthen during the minority of her son from 1671 until 1690.
Augustus Christian Frederick, Duke of Anhalt-Köthen
Augustus Christian Frederick of Anhalt-Köthen (Köthen, 18 November 1769 – Schloss Geuz, 5 May 1812), was a German prince of the House of Ascania, ruler of the principality of Anhalt-Köthen, and from 1806 the first "Duke of Anhalt-Köthen."
He was the eldest son of Karl George Lebrecht, Prince of Anhalt-Köthen, by his wife Louise Charlotte, daughter of Frederick, Duke of Schleswig-Holstein-Sonderburg-Glücksburg.
Louis of Anhalt-Köthen (the Younger)
Louis of Anhalt-Köthen, called The Younger (19 October 1607, in Köthen – 15 March 1624, in Köthen), was a German prince of the House of Ascania and heir to the principality of Anhalt-Köthen.
He was the only son of Louis I, Prince of Anhalt-Köthen, by his first wife Amöena Amalie, daughter of Arnold III, Count of Bentheim-Steinfurt-Tecklenburg-Limburg.
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.
Adolph I, Prince of Anhalt-Köthen
Adolph I, Prince of Anhalt- Köthen( died Zerbst, 28 August 1473), was a German prince of the House of Ascania and ruler of the principality of Anhalt- Köthen.
He was the eldest son of Albert IV, Prince of Anhalt- Köthen, by his first wife Elisabeth, daughter of Gebhard III, Count of Mansfeld.
Waldemar V, Prince of Anhalt-Köthen
Waldemar V, Prince of Anhalt- Köthen( died 1436) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Köthen.
He was the second son of Albert IV, Prince of Anhalt- Köthen, by his first wife Elisabeth, daughter of Gebhard III, Count of Mansfeld.
Augustus Louis, Prince of Anhalt-Köthen
Augustus Louis of Anhalt- Köthen( 9 June 1697 in Köthen – 6 August 1755 in Köthen), was a German prince of the House of Ascania and ruler of the principality of Anhalt- Köthen.
He was the third( second surviving) son of Emmanuel Lebrecht, Prince of Anhalt- Köthen, by his wife Gisela Agnes of Rath.
Louis I, Prince of Anhalt-Köthen
Louis I of Anhalt-Köthen (17 June 1579 in Dessau – 7 January 1650 in Köthen), was a German prince of the House of Ascania and ruler of the unified principality of Anhalt.
From 1603, he was ruler of the principality of Anhalt-Köthen.
He was also a founder of the first German Society (the Fruitbearing Society).
Louis was the seventh son of Joachim Ernest, Prince of Anhalt, but fifth-born son of his second wife Eleonore, daughter of Christoph, Duke of Württemberg.
Philip, Prince of Anhalt-Köthen
Philip, Prince of Anhalt-Köthen (31 May 1468 – 13 November 1500) was a German prince of the House of Ascania and ruler of the principality of Anhalt-Köthen.
He was the only son of Albert VI, Prince of Anhalt-Köthen, by his wife Elisabeth, daughter of Günther II, Count of Mansfeld.
Gisela Agnes of Anhalt-Köthen
Gisela Agnes of Anhalt- Köthen( 21 September 1722, Köthen – 20 April 1751, Dessau) was a princess of Anhalt- Köthen by birth and by marriage Duchess of Anhalt- Dessau.

Question: Who is Louis Of Anhalt-Köthen (The Younger)'s paternal grandfather?
Answer: Joachim Ernest, Prince of Anhalt