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.
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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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.
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.
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.
Queen Sofía of Spain
Sophia of Greece and Denmark (born 2 November 1938) is a member of the Spanish royal family who served as Queen of Spain during the reign of her husband, King Juan Carlos
I, from 1975 to 2014.
Queen Sofía is the first child of King Paul of Greece and Frederica of Hanover.
As her family was forced into exile during the Second World War, she spent part of her childhood in South Africa, returning to Greece in 1946.
She completed her secondary education in a boarding school in Germany before returning to Greece where she specialised in childcare, music and archaeology.
She married Juan Carlos, son of the Spanish pretender Infante Juan, on 14 May 1962 with whom she has had three children: Elena, Cristina, and Felipe.
She became queen upon her husband's accession in 1975.
On 19 June 2014, Juan Carlos abdicated in favor of their son Felipe VI.
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.
Infanta Elena, Duchess of Lugo
Infanta Elena, Duchess of Lugo
(Elena María Isabel Dominica de Silos de Borbón y de Grecia; born 20 December 1963) is the first child and elder daughter of King Juan Carlos I of Spain and Queen Sofía of Spain, and third in the line of succession to the Spanish throne.
She has a younger sister, Infanta Cristina, and a younger brother, King Felipe VI.
Infanta Elena has represented her family abroad on several occasions, having travelled to Germany, the United Kingdom, the United States, Argentina, Japan, Peru, and the Philippines.

Question: Who is Infanta Elena, Duchess Of Lugo's maternal grandmother?
Answer: Frederica of Hanover