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.
Kumaragupta I
Kumaragupta I (Gupta script: "Ku-ma-ra-gu-pta", r. c. 415-455 CE) was an emperor of the Gupta Empire of present-day India and Bangladesh.
A son of the Gupta emperor Chandragupta II and queen Dhruvadevi, he seems to have maintained control of his inherited territory, which extended from Gujarat in the west to Bengal region in the east.
Kumaragupta performed an Ashvamedha sacrifice, which was usually performed to prove imperial sovereignty, although no concrete information is available about his military achievements.
Based on the epigraphic and numismatic evidence, some modern historians have theorized that he may have subdued the Aulikaras of central India and the Traikutakas of western India.
The Bhitari pillar inscription states that his successor Skandagupta restored the fallen fortunes of the Gupta family, which has led to suggestions that during his last years, Kumaragupta suffered reverses, possibly against the Pushyamitras or the Hunas.
However, this cannot be said with certainty, and the situation described in the Bhitari inscription may have been the result of events that happened after his death.
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.
Purugupta
Purugupta (Gupta script: "Pu-ra-gu-pta") (reigned 467–473 CE) was an emperor of the Gupta dynasty in northern India.
Purugupta was a son of the Gupta emperor Kumaragupta I by his queen "Anantadevi".
He succeeded his half-brother Skandagupta.
No inscription of Purugupta has been found so far.
He is known from the Bhitari silver-copper seal of his grandson Kumaragupta III and Nalanda clay sealings of his sons Narasimhagupta and Budhagupta and his grandson Kumaragupta III.
From the Saranath Buddha image inscription, it is concluded that he was succeeded by Kumaragupta II.
According to a Nalanda seal of Vishnugupta, Vishnugupta was son of Kumaragupta (II), and grandson of Purugupta.
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.
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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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.
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.

Question: Who is the paternal grandmother of Purugupta?
Answer: Dhruvadevi