Stefanos Mengesha Seyoum
Prince Stefanos Mengesha Seyoum (also Estifanos Mangasha Seyum).
Born on 24 October 1952 at the Haile Selassie
I Hospital is a member of the Imperial Family of Ethiopia.
He serves as the Imperial Chancellor of Imperial Ethiopian Order of Saint Mary of Zion.
He is the son of "Ras" Mengesha Seyoum and Princess Aida Desta.
Through his father he is a great-great grandson of Emperor Yohannes IV, and through his mother, he is a great-grandson of Emperor Haile Selassie.
He was awarded the Grand Cross of the Royal Confraternity of San Teotonio.
He was educated at the University of Toronto, Canada.
He is an International Business Consultant and Director of the Canadian Royal Heritage Trust.
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.
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.
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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Aida Desta
Princess Aida Desta (8 April 1927 – 15 January 2013) (
Baptismal name Bisrate Gabriel), was the eldest granddaughter of Emperor Haile Selassie of Ethiopia, eldest child and daughter of "Ras" Desta Damtew and Princess Tenagnework.
She was the wife of "Leul Ras" Mangasha Seyum, Prince of Tigray, son of Seyum Mangasha, and great-grandson of Emperor Yohannes IV.
Her godmother was Empress Zewditu of Ethiopia.
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.
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.
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.

Question: Who is Stefanos Mengesha Seyoum's maternal grandmother?
Answer: Princess Tenagnework