Christian Heinrich, Margrave of Brandenburg-Bayreuth-Kulmbach
Christian Heinrich of Brandenburg-Bayreuth-Kulmbach (Bayreuth, 29 July 1661 – Weferlingen, 5 April 1708), was a German prince and member of the House of Hohenzollern and nominal Margrave of Brandenburg-Bayreuth-Kulmbach.
Margravine Magdalene Sibylle of Brandenburg-Bayreuth
Magdalene Sibylle of Brandenburg-Bayreuth (27 October 1612 – 20 March 1687) was Electress of Saxony from 1656 to 1680 as the wife of John George II.
The daughter of Christian, Margrave of Brandenburg-Bayreuth, and Marie of Prussia, she was by birth a "Markgräfin", or Margravine, and a member of the Brandenburg-Bayreuth branch of the House of Hohenzollern.
Born in Bayreuth, she was her parents' fifth child.
Her maternal grandparents were Albert Frederick, Duke of Prussia, and Marie Eleonore of Cleves.
One of her maternal aunts was Duchess Anna of Prussia.
She had three surviving siblings:
Anna Maria (1609–1680), wife of Prince Johann Anton
I von Eggenberg, Duke of Krumlov; Erdmann August (1615–1651); and George Albert (1619–1666).
She was married to John George, Prince Elector of Saxony, on 13 November 1638 in Dresden.
He was her first cousin, being the son of her maternal aunt and namesake, Magdalene Sibylle of Prussia.
Her sister-in-law and cousin was Magdalene Sibylle of Saxony.
They had three children:
Magdalene Sibylle had a good relationship with the Swedish royal family (the Queen consort from 1620 to 1632, Maria Eleonora of Brandenburg, was her first cousin) and was able to save the city of Pirna from attack by a letter to the Swedish commander in 1639, during the Thirty Years' War.
In 1680 she was widowed and retired to Freiberg-Colditz.
She died in Dresden in 1687.
George Frederick Charles, Margrave of Brandenburg-Bayreuth
George Frederick Charles, Margrave of Brandenburg- Bayreuth( 19 June 1688 at Oberzulzbürg Castle, near Mühlhausen – 17 May 1735 in Bayreuth), was a German prince, member of the House of Hohenzollern, nominal Margrave of Brandenburg- Bayreuth- Kulmbach( 1708 – 35) and Margrave of Brandenburg- Bayreuth( 1726–35).
Erdmann August, Hereditary Prince of Brandenburg-Bayreuth
Erdmann August of Brandenburg- Bayreuth( b. Bayreuth, 8 October
1615- d. Hof, 6 February 1651), was a member of the House of Hohenzollern and Hereditary Margrave( German:" Erbmarkgraf") of Brandenburg- Bayreuth.
He was the seventh of the nine children of Christian, Margrave of Brandenburg- Bayreuth by his wife, Marie of Prussia.
In fact, he was the third- born son but the only one to survive into adulthood; his two older brothers Georg Frederick( b. and d. 1608) and Christian Ernst( b. 1613- d. 1614) died long before his own birth.
In Ansbach on 8 December 1641, Erdmann August married the Margravine Sophie of Brandenburg- Ansbach, who was also his first cousin( daughter of Joachim Ernst, Margrave of Brandenburg- Ansbach, his father's brother).
They had only one son: Sophie died on 3 December 1646.
Erdmann August himself died four years later, aged thirty- five, in the middle of the preparations of his wedding with Sophie Agnes of Mecklenburg- Schwerin.
Because he predeceased his father, his son Christian Ernst succeeded as Margrave of Brandenburg- Bayreuth in 1655.
Christian, Margrave of Brandenburg-Bayreuth
Christian, Margrave of Brandenburg-Bayreuth (30 January 1581 in Cölln – 30 May 1655 in Bayreuth) was a member of the House of Hohenzollern and Margrave of Brandenburg-Kulmbach
(later renamed "Brandenburg-Bayreuth").
He was the eldest of eleven children born to John George, Elector of Brandenburg by his third wife Princess Elisabeth of Anhalt-Zerbst.
Sophia of Saxe-Weissenfels, Countess of Brandenburg-Bayreuth
Sophia of Saxe- Weissenfels( 2 August 1684, Weissenfels- 6 May 1752, near Hotzenplotz in Roßwald) was a German aristocrat and culture patron, Countess of Brandenburg- Bayreuth by marriage to George William, Margrave of Brandenburg- Bayreuth.
Frederick Christian, Margrave of Brandenburg-Bayreuth
Frederick Christian of Brandenburg- Bayreuth( 17 July 1708 in Weferlingen – 20 January 1769 in Bayreuth), was a member of the House of Hohenzollern and Margrave of Brandenburg- Bayreuth.
Magdalena Sibylla of Saxe-Weissenfels (1673–1726)
Magdalene Sibylle of Saxe- Weissenfels
( 3 September 1673 – 28 November 1726), was a German noblewoman member of the House of Wettin( Albertine line) and by marriage Duchess of Saxe- Eisenach.
Born in Halle, she was the oldest daughter and first child of Duke Johann Adolf I of Saxe- Weissenfels and his wife Johanna Magdalena, the daughter of Duke Frederick William II of Saxe- Altenburg.
She was named after her paternal great- grandmother, Duchess Magdalene Sibylle of Prussia.
Frederick, Margrave of Brandenburg-Bayreuth
Frederick, Margrave of Brandenburg- Bayreuth( May 10, 1711 in Weferlingen – February 26, 1763 in Bayreuth), was a member of the House of Hohenzollern and Margrave of Brandenburg- Bayreuth.
He was the eldest son of Georg Frederick Karl, nominal Margrave of Brandenburg- Bayreuth- Kulmbach, by his wife Dorothea of Schleswig- Holstein- Sonderburg- Beck.
George William, Margrave of Brandenburg-Bayreuth
George William of Brandenburg- Bayreuth( German:" Georg Wilhelm"; 26 November 1678 in Bayreuth – 18 December 1726 in Bayreuth) was a member of the House of Hohenzollern and Margrave of Brandenburg- Bayreuth.

Question: Who is Margravine Magdalene Sibylle Of Brandenburg-Bayreuth's paternal grandmother?