Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Maria of Gothia
Maria of Gothia was the first wife of David of Trebizond, last Emperor of Trebizond, whom she married in 1426.
Helena Kantakouzene, Empress of Trebizond
Helena Kantakouzene( died 1463) was the second wife of David of Trebizond, the last Emperor of Trebizond.
Recent research has led to doubts regarding her existence.
Alexios IV of Trebizond
Alexios IV Megas Komnenos or Alexius IV( 1382–1429), Emperor of Trebizond from 5 March 1417 to October 1429.
He was the son of Emperor Manuel III and Gulkhan- Eudokia of Georgia.
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.
Alexios III of Trebizond
Alexios III Megas Komnenos (5 October 1338 – 20 March 1390), or Alexius III, was Emperor of Trebizond from December 1349 until his death.
He is perhaps the best-documented ruler of that country, and his reign is distinguished by a number of religious grants and literary creations.
He was the son of Emperor Basil of Trebizond and his second (and bigamous) wife, Irene of Trebizond.
Alexios III was originally named John (Ιωάννης, "Iōannēs"), and took the name Alexios either in memory of his older brother who had died prematurely or of his paternal grandfather, Emperor Alexios II of Trebizond.
His personal appearance was described by George Finlay as "extremely noble".
Finlay contributes the following details: "He was florid, blonde, and regular-featured, with an aquiline nose, which, his flatterers often reminded him, was considered by Plato to be a royal feature.
In person he was stout and well formed; in disposition he was gay and liberal; but his enemies reproached him with rashness, violence, and brutal passions."
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.
Rusudan of Georgia, Empress of Trebizond
Rusudan of Georgia, Empress of Trebizond was a consort of Manuel I of Trebizond, and the mother of Empress Theodora.
Very little is known for certain about her.
Irene of Trebizond
Irene of Trebizond( died around 1382) was the bigamous wife of Basil of Trebizond, by whom he had two sons, Alexios and John( later Alexios III of Trebizond), and possibly three daughters Anna, Maria and Theodora.
Eudokia of Trebizond
Eudokia Megale Komnene (died after 4 September 1395), was a Trapezuntine noblewoman and a member of the powerful Byzantine Komnenos dynasty as a daughter of Emperor Alexios III of Trebizond.
She was styled "Despoina in Sinop" after her first marriage to Muslim Turkmen Tadjeddin Pasha of Sinop, Emir of Limnia, which had been arranged by her father to foster peaceful relations between the Pontic Greek Christians and the neighbouring Muslims.

Question: Who is Eudokia Of Trebizond's paternal grandmother?