August, Duke of Saxe-Merseburg-Zörbig
August, Duke of Saxe-Merseburg-Zörbig (Merseburg, 15 February 1655 – Zörbig, 27 March 1715), was a German prince and member of the House of Wettin.
He was the third but second surviving son of Christian I, Duke of Saxe-Merseburg and Christiana of Schleswig-Holstein-Sonderburg-Glücksburg.
Christiane of Saxe-Merseburg
Christiane of Saxe- Merseburg( 1 June 1659 – 13 March 1679), was a German noblewoman member of the House of Wettin and by marriage Duchess of Saxe- Gotha- Altenburg.
Born in Merseburg, she was a child of Christian I, Duke of Saxe- Merseburg and his wife Christiana of Schleswig- Holstein- Sonderburg- Glücksburg.
Christian III Maurice, Duke of Saxe-Merseburg
Christian III Maurice, Duke of Saxe-Merseburg (Merseburg, 7 November 1680 – Merseburg, 14 November 1694), was a duke of Saxe-Merseburg and member of the House of Wettin.
He was the eldest son of Christian II, Duke of Saxe-Merseburg, and Erdmuthe Dorothea of Saxe-Zeitz.
Christian II, Duke of Saxe-Merseburg
Christian II of Saxe- Merseburg( 19 November 1653 – 20 October 1694), was a duke of Saxe- Merseburg and member of the House of Wettin.
He was the second( but eldest surviving) son of Christian I, Duke of Saxe- Merseburg, and Christiana of Schleswig- Holstein- Sonderburg- Glücksburg.
Heinrich, Duke of Saxe-Merseburg
Heinrich, Duke of Saxe-Merseburg (Merseburg, 2 September 1661 – Doberlug, 28 July 1738), was a duke of Saxe-Merseburg and member of the House of Wettin.
He was the sixth (but fourth surviving) son of Christian I, Duke of Saxe-Merseburg and Christiana of Schleswig-Holstein-Sonderburg-Glücksburg.
Philipp, Duke of Saxe-Merseburg-Lauchstädt
Philipp, Duke of Saxe- Merseburg- Lauchstädt( 26 October 1657 – 1 July 1690) was a German prince.
He was a member of the House of Wettin.
He was born in Merseburg, the fifth but third surviving son of Christian I, Duke of Saxe- Merseburg and Christiana of Schleswig- Holstein- Sonderburg- Glücksburg.
Maurice Wilhelm, Duke of Saxe-Merseburg
Maurice Wilhelm, Duke of Saxe-Merseburg (5 February 1688 – 21 April 1731) was a duke of Saxe-Merseburg and member of the House of Wettin.
He was born in Merseburg, the fifth (but second surviving) son of Christian II, Duke of Saxe-Merseburg, and Erdmuthe Dorothea of Saxe-Zeitz.
Sophie Hedwig of Saxe-Merseburg
Sophie Hedwig of Saxe-Merseburg (4 August 1660 - 2 August 1686), was a German noblewoman member of the House of Wettin and by marriage Duchess of Saxe-Saalfeld.
Born in Merseburg, she was a child of Christian I, Duke of Saxe-Merseburg and his wife Christiana of Schleswig-Holstein-Sonderburg-Glücksburg.
Christiana of Schleswig-Holstein-Sonderburg-Glücksburg
Princess Christiana of Schleswig- Holstein- Sonderburg- Glücksburg, often referred to as" Christiane"( 22 September 1634 in Copenhagen – 20 May 1701 at Delitzsch Castle) was the consort of Christian I, Duke of Saxe- Merseburg, who was the ruling Duke of Saxe- Merseburg from 1650 until his death.
Christian I, Duke of Saxe-Merseburg
Christian I of Saxe-Merseburg (Dresden, 27 October 1615 – Merseburg, 18 October 1691), was the first duke of Saxe-Merseburg and a member of the House of Wettin.
He was the sixth (third surviving) son of Johann Georg I, Elector of Saxony, and his second wife Magdalene Sibylle of Prussia.

Question: What is the date of death of August, Duke Of Saxe-Merseburg-Zörbig's father?
Answer: 18 October 1691