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.
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.
Julia the Elder
Julia the Elder (30 October 39 BC – AD 14), known to her contemporaries as Julia Caesaris filia or Julia Augusti filia
(Classical Latin: or), was the daughter of Augustus Caesar, the first Roman Emperor, and his second wife, Scribonia.
Julia was also stepsister and second wife of the Emperor Tiberius; maternal grandmother of the Emperor Caligula and the Empress Agrippina the Younger; grandmother-in-law of the Emperor Claudius; and maternal great-grandmother of the Emperor Nero.
Gülbahar Hatun (wife of Mehmed II)
Gülbahar Hatun( 1432 – 1492) was the consort of Sultan Mehmed II, and mother of Sultan Bayezid II of the Ottoman Empire and the grandmother of Selim I.
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.
Hüma Hatun
Hüma Hatun (1410 ‒ September 1449) was the fourth wife of Ottoman Sultan Murad II and mother of Mehmed II and the grandmother of Bayezid II.
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.
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.
Lucius Caesar
Lucius Caesar (Latin: "Lucius Julius Caesar"; 17 BC – 20 August AD 2) was the grandson of Augustus.
The son of Marcus Vipsanius Agrippa and Julia the Elder, Augustus' only daughter, Lucius was adopted by his grandfather along with his older brother, Gaius Caesar.
As the emperor's adopted sons and joint-heirs to the Roman Empire, Lucius and Gaius had promising political and military careers.
However, Lucius died of a sudden illness on 20 August AD 2, in Massilia, Gaul, while traveling to meet the Roman army in Hispania.
His brother Gaius also died at a relatively young age on 21 February, AD 4.

Question: Who is the maternal grandmother of Lucius Caesar?
Answer: Scribonia