Zofia Odrowąż
Zofia Odrowąż (1537–1580) was a Polish noblewoman.
She was the daughter of castellan and voivode Stanisław Odrowąż and only daughter of Anna of Masovia,
last Masovian duchess of the Piast dynasty, and became the widow of the castellan of Wojnicz and castellan of Sandomierz..
She married firstly, Hetman Jan Krzysztof Tarnowski and secondly, castellan and voivode Jan Kostka in 1569.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds 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.
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.
Anna Kostka
Anna Kostka (1575–1635) was a Polish–Lithuanian noblewoman.
Anna was the daughter of Jan Kostka and Zofia Odrowąż, and related to Saint Stanislas Kostka.
She married Aleksander Ostrogski in 1592.
She inherited the city of Jarosław as well as several other areas after her mother.
After being widowed in 1603, she lived an independent life as the manager of her own and her children's dominions.
She benefited the university of Jarosław, introduced the Benedictine order to the city, protected the Jesuits, commissioned several later famed art objects for the churches and became known for her charity toward the poor.
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.
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.
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.
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.

Question: Who is the maternal grandmother of Anna Kostka?
Answer: Anna of Masovia