Sophia Eudokia Laskarina
Sophia Eudokia Laskarina (born between 1210 and 1212, died between 1247 and 1253) was a Byzantine princess.
She was a daughter of Theodore
I Laskaris, Emperor of Nicaea, and Anna Komnene Angelina.
She was originally called Eudokia and renamed Sophia.
She was engaged to Robert I, Latin Emperor, but the marriage was blocked by the Patriarch of Constantinople.
She married firstly and divorced Frederick II, Duke of Austria, secondly (before 1230)
Anseau de Cayeux, Governor of Asia Minor.
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.
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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Anna Komnene Angelina
Anna Komnene Angelina or Comnena Angelina (c. 1176 – 1212) was an Empress of Nicaea.
She was the daughter of the Byzantine Emperor Alexios
III Angelos and of Euphrosyne Doukaina Kamatera.
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Kaoru Hatoyama
After the elections of 2009, she became more widely known as the grandmother of Prime Minister Yukio Hatoyama and his politician brother Kunio Hatoyama.
Anne Denman
Anne Denman( 1587–1661) was born in Olde Hall, Retford, Nottinghamshire.
Through a fortunate second marriage with Thomas Aylesbury, she became the grandmother of Lady Anne Hyde, Duchess of York and great- grandmother of Queen Mary II and Queen Anne.
Diana Guardato
Diana Guardato was a member of the aristocratic Patrician Guardato family, and had three children with King Ferdinand I: Diana Guardato is the 16th- Great Grandmother of His Royal Highness Albert II of Belgium, 15th- Great Grandmother of His Majesty Juan Carlos
I of Spain, 17th- Great Grandmother of Philippe of Belgium, 14th- Great Grandmother of His Majesty Manuel II of Portugal, 16th- Great Grandmother of Grand Duke Henri, as well as many others.
Purnima (Hindi actress)
Purnima Das Verma( born Meherbhano Mohammad Ali) was an Indian film actress who worked predominantly in Hindi language films.
She is the grandmother of actor Emraan Hashmi.

Question: Who is the maternal grandmother of Sophia Eudokia Laskarina?
Answer: Euphrosyne Doukaina Kamatera