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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Archidamus V
Archidamus V  was the 27th of the Kings of Sparta of the Eurypontid line, reigning during 228 and 227 BC.
He was the son of Eudamidas II and Agesistrata and through him the grandson of Archidamus IV, after whom he was named.
After his brother Agis IV was murdered in 241 BC, he fled to Messenia.
In 228 (or 227)
he was ordered back to Sparta by King Cleomenes III of the Agiad line, who had no counterpart on the throne by then, after the death of Eudamidas III, the son of Agis IV.
He was assassinated shortly afterwards.
Polybius claims that he was killed by Cleomenes.
Agesistrata
Agesistrata (died 241 BC), was a Spartan queen, married to king Eudamidas II of Sparta.
She was the daughter of king Eudamidas
I och Arachidamia.
She and her mother were the wealthiest women in Sparta.
She and her mother were initially unwilling to support her son's radical reforms, but was convinced to do so by her brother Agesilaus, and donated their fortunes to finance the reforms.
When her son was deposed in 241, both she and her mother were killed.
Agis III
Agis III( Greek:) was the eldest son of Archidamus III, and the 21st Eurypontid king of Sparta.
Archidamia
Archidamia( c. 340-241 BC) was a Spartan queen, wife of Eudamidas I, mother of Archidamus IV and Agesistrata, grandmother of Eudamidas II, great- grandmother and grandmother of Agis IV.
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.
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.
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 Archidamus V's maternal grandmother?
Answer: Arachidamia