John I, Duke of Brunswick-Grubenhagen
John I, Duke of Brunswick- Grubenhagen( born: before 1322; died: 23 May 1367) was provost of the St. Alexandri Minster in Einbeck.
He was the son of Duke Henry I" the Marvelous" of Brunswick- Grubenhagen and his wife Agnes of Meissen, daughter of Margrave Albert II of Meissen.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Albrecht I of Meissen
Albrecht I of Meissen( died 1 August 1152) was Bishop of Meissen from 1150 to 1152.
Agnes of Meissen
Agnes of Meissen (born before 1264 – died after September 1332) was a noblewoman, the daughter of Albert II, Margrave of Meissen and his wife Margaret of Sicily.
Agnes was married with Henry I "the Marvelous" of Brunswick-Grubenhagen, in 1282.
They had 16 children:
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.
Agnes of Waiblingen
Agnes of Waiblingen( 1072/ 73 – 24 September 1143), also known as Agnes of Germany, Agnes of Poitou and Agnes of Saarbrücken, was a member of the Salian imperial family.
Through her first marriage, she was Duchess of Swabia; through her second marriage, she was Margravine of Austria.
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.
Margaret of Sicily
Margaret of Sicily (also called Margaret of Hohenstaufen or Margaret of Germany) (1 December 1241, in Foggia – 8 August 1270, in Frankfurt-am-Main)
was a Princess of Sicily and Germany, and a member of the House of Hohenstaufen.
By marriage she was Landgravine of Thuringia and Countess Palatine of Saxony (German: "
Landgräfin von Thüringen und Pfalzgräfin von Sachsen").
She was the daughter of Frederick II, Holy Roman Emperor, King of Sicily and Germany, by his third wife, Isabella of England.
Her paternal grandparents were Henry VI, Holy Roman Emperor and Constance of Sicily.
Her maternal grandparents were John of England and Isabella of Angoulême.
Mona Hopton Bell
Mona Hopton Bell( 1867- 1940) was a British artist, best known for her portraits of civic figures.
She was the grandmother of the painter Jean H. Bell.
Agnes II, Abbess of Quedlinburg
Agnes II( Agnes of Meissen; 1139 – 21 January 1203) was a member of the House of Wettin who reigned as Princess- Abbess of Quedlinburg.

Question: Who is the maternal grandmother of Agnes Of Meissen?
Answer: Isabella of England