Question: Who is Emmanuel Lebrecht, Prince Of Anhalt-Köthen's paternal grandfather?

Prince Louis of Anhalt-Köthen
Louis of Anhalt- Köthen( b. Köthen, 25 September
1778- d. Köthen, 16 September 1802) was a German prince of the House of Ascania.
He was the third son of Karl George Lebrecht, Prince of Anhalt- Köthen, and his wife Louise Charlotte, daughter of Frederick, Duke of Schleswig- Holstein- Sonderburg- Glücksburg.
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.
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.
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.
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 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.
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.
Leopold, Prince of Anhalt-Köthen
Leopold of Anhalt-Köthen (29 November 1694 – 19 November 1728) was a German prince of the House of Ascania and ruler of the principality of Anhalt-Köthen.
Today, he is best remembered for employing Johann Sebastian Bach as his Kapellmeister between 1717 and 1723.
He was born at Köthen, the second (but eldest surviving) son of Emmanuel Lebrecht, Prince of Anhalt-Köthen, by his wife Gisela Agnes of Rath.
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.

Answer: Augustus, Prince of Anhalt-Plötzkau