Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Gaston, Count of Eu
Prince Gaston of Orleans, Count of Eu (28 April 1842 – 28 August 1922), the first son of Louis, Duke of Nemours, and Princess Victoria of Saxe-Coburg and Gotha, was a French prince and military commander who fought in the Spanish-Moroccan War and the Paraguayan War.
Gaston was married to Princess Isabel, heiress to the Brazilian throne.
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.
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.
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.
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.
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.
Prince Luís of Orléans-Braganza (1878–1920)
Prince Luís of Orléans-Braganza (26 January 1878 – 26 March 1920), was a claimant to the former throne of the Empire of Brazil.
He was born in Brazil, the second son of Prince Gaston, Count of Eu, and Isabel, Princess Imperial of Brazil.
He was exiled along with his family as the result of the 1889 coup d'état that resulted in the formation of the republic.
In 1908, the year he married, his older brother Pedro renounced his claim to succeed his mother in her claim to the imperial throne, leaving "Dom" Luís as her heir.
In this role he worked with monarchists in Brazil in several attempts to restore the monarchy.
At the outbreak of World War I he enlisted as an officer with the British Armed Forces and saw action in Flanders where he contracted a virulent form of rheumatism that caused his death at the age of 42.
His efforts on behalf of the Allies of World War
I saw him decorated by Belgium, France and Great Britain.
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.

Question: Who is the paternal grandmother of Prince Luís Of Orléans-Braganza (1878–1920)?
Answer: Princess Victoria of Saxe-Coburg and Gotha