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.
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.
Augustus, Prince of Anhalt-Plötzkau
Augustus of Anhalt-Plötzkau (Dessau, 14 July 1575 – Plötzkau, 22 August 1653), 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-Plötzkau.
Augustus was the fourth son of Joachim Ernest, Prince of Anhalt, but second-born son of his second wife Eleonore, daughter of Christoph, Duke of Württemberg.
Emmanuel, Prince of Anhalt-Köthen
Emmanuel of Anhalt-Köthen (Plötzkau, 6 October 1631 – Köthen, 8 November 1670), was a German prince of the House of Ascania and ruler of the principality of Anhalt-Plötzkau.
From 1665, he was ruler of the principality of Anhalt-Köthen.
He was the third and youngest son of Augustus, Prince of Anhalt-Plötzkau, by his wife Sibylle, daughter of John George I, Count of Solms-Laubach.
Albert VI, Prince of Anhalt-Köthen
Albert VI, Prince of Anhalt- Köthen( died 9 January 1475) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Köthen.
He was the youngest son of Albert IV, Prince of Anhalt- Köthen, but the eldest child of his second wife Elisabeth, daughter of Gebhard XI, Count of Querfurt.
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.
Emmanuel Lebrecht, Prince of Anhalt-Köthen
Emmanuel Lebrecht of Anhalt-Köthen (Köthen, 20 May 1671 – Köthen, 30 May 1704), was a German prince of the House of Ascania and ruler of the principality of Anhalt-Köthen.
He was the only child of Emmanuel, Prince of Anhalt-Köthen, by his wife Anna Eleonore, daughter of Henry Ernest, Count of Stolberg.
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 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.
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.

Question: Who is the paternal grandfather of Emmanuel, Prince Of Anhalt-Köthen?
Answer: Joachim Ernest, Prince of Anhalt