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.
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.
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.
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.
Livilla
Claudia Livia Julia (Classical Latin: ; c. 13 BC – AD 31) was the only daughter of Nero Claudius Drusus and Antonia Minor and sister of the Roman Emperor Claudius and general Germanicus, and thus the paternal aunt of the emperor Caligula and maternal great-aunt of emperor Nero, as well as the niece and daughter-in-law of Tiberius.
She was named after her grandmother, Augustus' wife Livia Drusilla, and commonly known by her family nickname Livilla ("little Livia").
She was born after Germanicus and before Claudius.
She was twice married to the potential successor in the Julio-Claudian dynasty, first to Augustus' grandson Gaius Caesar
(died 4 AD) and later to Tiberius' son Drusus the Younger (died AD 23).
Allegedly, she helped her lover Sejanus in poisoning her second husband and died shortly after Sejanus fell from power in AD 31.
Antonia Minor
Antonia Minor, also known as Julia Antonia Minor, Antonia the Younger or simply Antonia( 31 January 36 BC- 1 May AD 37) was the younger of two daughters of Mark Antony and Octavia Minor.
She was a niece of the Emperor Augustus, sister of Cleopatra Selene II, sister- in- law of the Emperor Tiberius, paternal grandmother of the Emperor Caligula and Empress Agrippina the Younger, mother of the Emperor Claudius, and both maternal great- grandmother and paternal great- aunt of the Emperor Nero.
She was additionally the maternal great- aunt of the Empress Valeria Messalina and Faustus Cornelius Sulla Felix, the paternal grandmother of Claudia Antonia, Claudia Octavia, and Britannicus and the maternal grandmother of Julia Livia and Tiberius Gemellus.
Julia Livia
Julia Livia (c.7–43 AD), sometimes referred to as Julia Drusi Caesaris filia (Julia, daughter of Drusus Caesar), was the daughter of Drusus Julius Caesar and Livilla, and granddaughter of the Roman Emperor Tiberius.
She was also a first cousin of the emperor Caligula, and niece of the emperor Claudius.
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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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 maternal grandmother of Julia Livia?
Answer: Antonia Minor