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.
Margaret of Brandenburg, Duchess of Pomerania
Margaret of Brandenburg( 1511 – after 3 November 1577) was a Princess of Brandenburg by birth and by marrying first a duke of Pomerania and later a prince of Anhalt.
Margaret of Baden
Margaret of Baden( 1431 – 24 October 1457) was a Margravine of Baden by birth and by marriage Margravine of Brandenburg- Ansbach and Brandenburg- Kulmbach.
She was the daughter of Jacob, Margrave of Baden- Baden, and his wife Catherine of Lorraine.
In 1446, Margaret married Albert of Brandenburg, the future Albert III Achilles, Elector of Brandenburg, in Heilsbronn.
Margaret died before he succeeded to the Electorate of Brandenburg, thus never served as Electress.
Their marriage produced three sons and three daughters:
Margaret died in Ansbach in 1457 shortly after her husband acquired the Margraviate of Brandenburg- Kulmbach.
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.
Margaret of Brandenburg (1453–1509)
Margaret of Brandenburg( 18 April 1453 – 27 April 1509, Hof) was a princess of Brandenburg by birth and abbess of the Poor Clares monastery at Hof from 1476 to 1490.
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.
Albert III, Margrave of Brandenburg-Salzwedel
Albert III, Margrave of Brandenburg-Salzwedel (– between 19 November and 4 December 1300) was a Margrave of Brandenburg.
He was a member of the Brandenburg-Salzwedel branch of the House of Ascania, which existed from 1266 to 1317.
He was a son of Otto III and his wife, Beatrice (or) of Bohemia.
As a son of Otto, he was entitled to use the title of Margrave and he did sign some official documents,
be he was never more than a co-ruler.
The real power was wielded by his cousin Otto IV "with the arrow".
Albert III administered the Lordship of Stargard, which Brandenburg had acquired from Pomerania in 1236.
Albert III was from 1284 the sole ruler of Stargard and Lychen.
After his sons Otto and John died (around 1299), Albert III sold Stargard to his son-in-law Henry II of Mecklenburg.
The 1304 Treaty of Vietmannsdorf confirmed Henry II as Lord a Stargard and enshrined that it was held as a fief from Brandenburg.
In 1299, a year before his death, he founded the Cistercian monastery ("Gate to Heaven") in Lychen.
Albert III died on 3 December 1300 and was initially buried at Lehnin Abbey.
In 1309, his body was transferred to the "Coeli Porta" monastery.
It was subsequently lost.
Margaret of Brandenburg
Margaret of Brandenburg-Salzwedel (born ca. 1270 – died 1 May 1315) was a German noblewoman member of the House of Ascania and by her two marriages Duchess of Greater Poland (during 1293–1296), Queen of Poland (during 1295–1296) and Duchess of Saxe-Lauenburg (during 1302–1308).
She was the youngest child and second daughter of Albert III, Margrave of Brandenburg-Salzwedel and Matilda of Denmark, daughter of King Christopher 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".
Margaret of Brandenburg (1450–1489)
Margaret of Brandenburg( 1449 or 1450 – 1489) was a princess of Brandenburg by birth and by marriage Duchess of Pomerania.

Question: Who is the paternal grandfather of Margaret Of Brandenburg?
Answer: Otto III