Question: Who is the paternal grandfather of Sigismund I, Prince Of Anhalt-Dessau?

George II, Prince of Anhalt-Dessau
George II, Prince of Anhalt- Dessau( 1454 – 25 April 1509) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Dessau.
He was the fourth son of George I, Prince of Anhalt- Dessau, as second- born child of his fourth wife Anna, daughter of Albert VIII, Count of Lindau- Ruppin.
Ernest I, Prince of Anhalt-Dessau
Ernest I, Prince of Anhalt- Dessau( died Dessau, 12 June 1516), was a German prince of the House of Ascania and ruler of the principality of Anhalt- Dessau.
He was the second son of George I, Prince of Anhalt- Dessau, yet the first born by his fourth wife Anna, daughter of Albert VIII, Count of Lindow- Ruppin.
George I, Prince of Anhalt-Dessau
George I, Prince of Anhalt- Dessau( – 21 September 1474), was a German prince of the House of Ascania and ruler of the principality of Anhalt- Dessau.
He was the second son of Sigismund I, Prince of Anhalt- Dessau, by his wife Judith, daughter of Gebhard XI, Count of Querfurt.
Countess Henriette Catherine of Nassau
Henriette Catherine of Nassau (10 February 1637 – 3 November 1708) was princess consort of Anhalt-Dessau by marriage to John George II, Prince of Anhalt-Dessau, and regent of Anhalt-Dessau from 1693 to 1698 during the minority (and then the absence) of her son Leopold I, Prince of Anhalt-Dessau.
Sigismund II, Prince of Anhalt-Dessau
Sigismund II, Prince of Anhalt- Dessau( died aft. 22 May 1452) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Dessau.
He was the fourth son of Sigismund I, Prince of Anhalt- Dessau, by his wife Judith, daughter of Gebhard XI, Count of Querfurt.
John II, Prince of Anhalt-Zerbst
John II, Prince of Anhalt-Zerbst (died 11 April 1382) was a German prince of the House of Ascania and ruler of the principality of Anhalt-Zerbst.
He was the youngest son of Albert II, Prince of Anhalt-Zerbst, by his second wife Beatrix, daughter of Rudolf I, Elector of Saxony and Duke of Saxe-Wittemberg.
Albert V, Prince of Anhalt-Dessau
Albert V, Prince of Anhalt- Dessau( died ca. 1469) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Dessau.
He was the fifth son of Sigismund I, Prince of Anhalt- Dessau, by his wife Judith, daughter of Gebhard XI, Count of Querfurt.
Sigismund I, Prince of Anhalt-Dessau
Sigismund I, Prince of Anhalt-Dessau (died Coswig, 19 January 1405), 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-Dessau.
He was the eldest son of John II, Prince of Anhalt-Zerbst, by his wife Elisabeth, daughter of John I, Count of Henneberg-Schleusingen.
Rudolph IV, Prince of Anhalt-Dessau
Rudolph IV, Prince of Anhalt- Dessau( died 7 September 1510) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Dessau.
He was the fifth son of George I, Prince of Anhalt- Dessau, as the fourth- born child of his fourth wife Anna, daughter of Albert VIII, Count of Lindau- Ruppin.
Waldemar IV, Prince of Anhalt-Dessau
Waldemar IV, Prince of Anhalt- Dessau( died aft. 22 July 1417) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Dessau.
He was the eldest son of Sigismund I, Prince of Anhalt- Dessau, by his wife Judith, daughter of Gebhard XI, Count of Querfurt.

Answer: Albert II, Prince of Anhalt-Zerbst