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.
Iyoas I
Iyoas I or Joas I
(Ge'ez:
ኢዮአስ, throne name Adyam Sagad, Ge'ez: አድያም ሰገድ, "to whom the confines of the earth bow")
(d. 14 May 1769) was "nəgusä nägäst" (27 June 1755 – 7 May 1769) of Ethiopia, and a member of the Solomonic dynasty.
He was the infant son of Iyasu II and Wubit (Welete Bersabe), the daughter of an Oromo chieftain of the Yejju district.
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.
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.
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.
Iyasu II
Iyasu II or Joshua II (Ge'ez ኢያሱ; 21 October 1723 – 27 June 1755) was "nəgusä nägäst"
(throne name Alem Sagad, Ge'ez ዓለም ሰገድ ʿAläm Sägäd, "to whom the world bows")
(19 September 1730 – 27 June 1755) of Ethiopia, and a member of the Gondar branch of the Solomonic dynasty.
He was the son of Emperor Bakaffa and Empress Mentewab (also known by her Baptismal name of Welete Giyorgis).
The Empress Mentewab played a major role in Iyasu's reign, perhaps against her will.
Shortly after he was proclaimed Emperor, a rival claimant assaulted the Royal Enclosure for eight days, only leaving the capital Gondar when an army of 30,000 from Gojjam appeared.
Although the rebels failed to penetrate its walls, nonetheless much of Gondar was left in ruins.
Instead of taking the title of regent upon the succession of her underage son, Empress Mentewab had herself crowned as co-ruler, becoming the first woman to be crowned in this manner in Ethiopian history.
Empress Mentewab wielded significant authority throughout the reign of her son, and well into the reign of her grandson as well.
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.
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.

Question: Who is the paternal grandmother of Iyoas I?
Answer: Mentewab