John VI, Prince of Anhalt-Zerbst
John VI of Anhalt-Zerbst (Zerbst, 24 March 1621 – Zerbst, 4 July 1667), was a German prince of the House of Ascania and ruler of the principality of Anhalt-Zerbst.
He was the only son of Rudolph, Prince of Anhalt-Zerbst, by his second wife Magdalene, daughter of John VII, Count of Oldenburg.
Charles, Prince of Anhalt-Zerbst
Charles William, Prince of Anhalt- Zerbst( German: Karl Wilhelm; 16 October 1652, in Zerbst – 3 November 1718, in Zerbst), was a German prince of the House of Ascania and ruler of the principality of Anhalt- Zerbst.
He was the third( but eldest surviving) son of John VI, Prince of Anhalt- Zerbst, and Sophie Auguste, daughter of Frederick III, Duke of Schleswig- Holstein- Gottorp.
His two older brothers died before his birth.
Bernhard VII, Prince of Anhalt-Zerbst
Bernhard VII of Anhalt- Zerbst( 17 March 1540 – 1 March 1570), was a German prince of the House of Ascania and ruler of the principality of Anhalt- Zerbst.
He was born and died in Dessau, and was the third and youngest son of John V, Prince of Anhalt- Zerbst by his wife Margaret, daughter of Joachim I Nestor, Elector of Brandenburg.
Princess Sophie Auguste of Anhalt-Zerbst
Sophie Auguste of Anhalt-Zerbst (9 March 1663 – 14 September 1694), was a German noblewoman member of the House of Ascania and by marriage Duchess of Saxe-Weimar.
Born in Zerbst, she was the eleventh of fourteen children born from the marriage of John VI, Prince of Anhalt-Zerbst and Sophie Augusta of Holstein-Gottorp.
Of her thirteen older and younger siblings, only four survived to adulthood:
Karl William, Anthony Günther, John Adolph and John Louis.
Waldemar I, Prince of Anhalt-Zerbst
Waldemar I, Prince of Anhalt- Zerbst( died 7 January 1368) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Zerbst.
He was the youngest son of Albert I, Prince of Anhalt- Zerbst, by his second wife Agnes, daughter of Conrad, Margrave of Brandenburg- Stendal.
Albert II, Prince of Anhalt-Zerbst
Albert II, Prince of Anhalt- Zerbst( died 17 July 1362) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Zerbst.
He was the third son of Albert I, Prince of Anhalt- Zerbst, but the eldest child born to his second wife Agnes, daughter of Conrad, Margrave of Brandenburg- Stendal.
Waldemar III, Prince of Anhalt-Zerbst
Waldemar III, Prince of Anhalt- Zerbst( died 1391) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Zerbst.
He was the youngest son of John II, Prince of Anhalt- Zerbst, by his wife Elisabeth, daughter of John I, Count of Henneberg- Schleusingen.
Karl I, Prince of Anhalt-Zerbst
Karl I of Anhalt- Zerbst( 17 November 1534 in Dessau – 4 May 1561 in Zerbst), was a German prince of the House of Ascania and ruler of the principality of Anhalt- Zerbst.
He was the eldest son of John V, Prince of Anhalt- Zerbst, by his wife Margaret, daughter of Joachim I Nestor, Elector of Brandenburg.
Anthony Günther, Prince of Anhalt-Zerbst
Anthony Günther, Prince of Anhalt- Zerbst( 11 November 1653 – 10 December 1714) was a German prince of the House of Ascania.
He was born in Zerbst, the fourth( but second surviving) son of John VI, Prince of Anhalt- Zerbst, by his wife Sophie Auguste, daughter of Frederick III, Duke of Schleswig- Holstein- Gottorp.
Princess Magdalena Augusta of Anhalt-Zerbst
Princess Magdalena Augusta of Anhalt- Zerbst( 13 October 1679 – 11 October 1740) was, by birth, a Princess of Anhalt- Zerbst and, by marriage, a Duchess of Saxe- Gotha- Altenburg.
She was the maternal grandmother of George III of the United Kingdom.
She was born Princess Magdalena Augusta of Anhalt- Zerbst.
Her father was Karl of Anhalt- Zerbst and her mother was Duchess Sophia of Saxe- Weissenfels.

Question: Who is Princess Sophie Auguste Of Anhalt-Zerbst's paternal grandfather?