William of Bavaria-Munich
William of Bavaria- Munich( 1435 – 1435) was a German nobleman.
He was the son of Margaret of Cleves and her first husband William III, Duke of Bavaria.
He was born after his father ’s death and died in infancy, being buried in the church of the Carmelites in Straubing.
His elder brother Adolf nominally ruled as duke alongside his uncle Ernest and his cousin Albert III until he died at age seven.
John, Duke of Ścinawa
John( c. 1298 – by 19 May 1365) was a Duke of Żagań, Ścinawa, etc. during 1309 – 1317( with his brothers as co-rulers), Duke of Poznań during 1312 – 1314( with his brothers) and sole Duke of Ścinawa since.
He was the fourth son of Henry III( I), Duke of Głogów, by his wife Matilda, daughter of Albert I, Duke of Brunswick- Lüneburg.
Susanna of Bavaria
Susanna of Bavaria (2 April 1502 – 23 April 1543) was a German noblewoman.
Born in Munich, she was the daughter of Albert IV, Duke of Bavaria, and Kunigunde of Austria, herself the daughter of Holy Roman Emperor Frederick III and Eleanor of Portugal.
Her paternal grandparents were Albert III, Duke of Bavaria, and Anna of Brunswick-Grubenhagen-Einbeck.
Elisabetta Visconti
Elisabetta Visconti (1374 – 2 February 1432), also known as "Elisabeth" or "Elizabeth", was a younger child of Bernabò Visconti and his wife, Beatrice Regina della Scala.
Elisabetta was a member of the House of Visconti.
Taddea Visconti
Taddea Visconti, Duchess of Bavaria (1351 – 28 September 1381) was an Italian noblewoman of the Visconti family, the ruling house in Milan from 1277 to 1447.
She was the first wife of Stephen III, Duke of Bavaria, and the mother of the French queen Isabeau of Bavaria.
Albert III, Duke of Bavaria
Albert III the Pious of Bavaria-Munich (27 March 1401 – 29 February 1460), since 1438 Duke of Bavaria-Munich.
He was born in Wolfratshausen to Ernest, Duke of Bavaria and Elisabetta Visconti, daughter of Bernabò Visconti.
Agnes Bernauer
Agnes Bernauer( c. 1410 – 12 October 1435) was the mistress and perhaps also the first wife of Albert, later Albert III, Duke of Bavaria.
Because his father, Ernest, ruling Duke of Bavaria at the time, considered this liaison with a commoner unbefitting his son's social standing, he clashed with his son over the matter and finally arranged to have Agnes condemned for witchcraft and drowned in the Danube in 1435.
Her life and death have been depicted in numerous literary works, the most well known being Friedrich Hebbel's tragedy of the same name and the folk musical" Die Bernauerin" by the composer Carl Orff.
Hubba bint Hulail
Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic" Nabī"( Prophet) Muhammad ibn Abdullah.
Adolf, Duke of Bavaria
Adolf( 7 January 1434, Munich- 24 October 1441, Munich) was a German nobleman.
He was a Duke of Bavaria- Munich in the House of Wittelsbach.
He was the eldest son of William III, Duke of Bavaria and Margaret of Cleves.
His younger brother William of Bavaria- Munich died in infancy.
Since William III's brother Ernest and Ernest's son Albert III were available as ruling dukes, Adolf's role was very limited.
He died aged only seven and thus had little effect on the duchy's fortunes.
Tjuyu
Tjuyu( sometimes transliterated as Thuya or Thuyu) was an Egyptian noblewoman and the mother of queen Tiye, and the wife of Yuya.
She is the grandmother of Akhenaten, and great grandmother of Tutankhamun.

Question: Who is Albert Iii, Duke Of Bavaria's maternal grandmother?
Answer: Beatrice Regina della Scala