Sabina of Brandenburg-Ansbach
Sabina of Brandenburg-Ansbach (12 May 1529 – 2 November 1575) was a princess of Brandenburg-Ansbach and Electress of Brandenburg by marriage.
Elisabeth of Brandenburg-Küstrin
Elizabeth of Brandenburg- Küstrin( 29 August 1540 – 8 March 1578), was a princess of Brandenburg- Küstrin and margravine of Brandenburg- Ansbach and Brandenburg- Kulmbach by marriage.
Anna of Brandenburg
Anna of Brandenburg (27 August 1487 – 3 May 1514) was a German noblewoman.
Margravine Anna was the daughter of John Cicero, Elector of Brandenburg and Margaret of Thuringia.
She was born in Berlin, Brandenburg, and died in Kiel, Holstein.
Anna of Brandenburg, Duchess of Mecklenburg
Anna of Brandenburg (1 January 1507 – June 19, 1567 in Lübz) was a Duchess consort of Mecklenburg.
Catherine of Brandenburg-Küstrin
Catherine of Brandenburg- Küstrin( 10 August 1549 – 30 September 1602) was a Margravine of Brandenburg- Küstrin by birth and Electress of Brandenburg by marriage.
Kaya Alp
Kaya Alp was, according to Ottoman tradition, the son of Kızıl Buğa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertuğrul, and the great grandfather of the Ottoman Empire founder, Osman I.
Margaret of Thuringia
Margaret of Thuringia or Margaret of Saxony (1449 – 13 July 1501) was a German noblewoman, Electress of Brandenburg by marriage.
She was the daughter of William III, Landgrave of Thuringia and Anne of Austria, Duchess of Luxembourg "suo jure".
Anna of Mecklenburg
Anna of Mecklenburg( 14 October 15334 July 1602), was a Duchess consort of Courland by marriage to the Duke of Courland, Gotthard Kettler.
She was the daughter of Albrecht VII, Duke of Mecklenburg and Anna of Brandenburg.
Anna is the first woman in Livonia whose life story is entirely historically confirmed.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Conrad, Margrave of Brandenburg-Stendal
Margrave Conrad I of Brandenburg (– 1304) was a member of the House of Ascania and a co-ruler of Brandenburg.

Question: Who is Anna Of Brandenburg's maternal grandfather?