Reinhard II, Count of Hanau
Reinhard II of Hanau( – 26 June 1451 in Hanau) was Lord of Hanau and from 1429 Count of Hanau.
He was one of the most important member of the House of Hanau.
Margaret of Hanau (1452-1467)
Margaret of Hanau (1452 – 14 March 1467) was the only daughter of Count Reinhard III of Hanau (1412-1452) and his wife Countess Palatine Margaret of Mosbach (1432-1457).
Friedrich Casimir, Count of Hanau-Lichtenberg
Friedrich Casimir of Hanau( born 4 August 1623 in Bouxwiller; died: 30 March 1685 in Hanau) was a member of the Hanau- Lichtenberg branch of the House of Hanau.
He was the ruling Count of Hanau- Lichtenberg from 1641 and of Hanau- Münzenberg from 1642.
Ulrich II, Lord of Hanau
Ulrich II, Lord of Hanau( – 23 September 1346) was Lord of Hanau from 1305/ 1306 until his death.
Reinhard III, Count of Hanau
Count Reinhard III of Hanau( 22 April 1412 – 20 April 1452 in Heidelberg) was Count of Hanau from 1451 until his death.
He was the son of Count Reinhard II of Hanau and his wife, Catherine of Nassau- Beilstein.
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.
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.
Reinhard I, Lord of Hanau
Reinhard I, Lord of Hanau( – 20 September 1281; first mentioned in 1243) is the ancestor of the House of Hanau.
Katharina of Nassau-Beilstein
Katharina of Nassau- Beilstein( died 6 September 1459) was Countess of Hanau by marriage to Reinhard II, Count of Hanau, and regent of Hanau during the minority of her son Reinhard III from 1452 until 1458.
Countess Palatine Margaret of Mosbach
Countess Palatine Margaret of Mosbach (2 March 1432 – 14 September 1457) was the eldest daughter of Count Palatine Otto I of Mosbach and his wife, Johanna of Bavaria-Landshut.
She married on 11 July 1446 to Count Reinhard III of Hanau, who succeeded his father as ruling Count in 1451.

Question: Who is Margaret Of Hanau (1452-1467)'s maternal grandmother?
Answer: Johanna of Bavaria-Landshut