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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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.
Maria of Gothia
Maria of Gothia was the first wife of David of Trebizond, last Emperor of Trebizond, whom she married in 1426.
Maria of Trebizond
Maria Megale Komnene (died 17 December 1439), known as Maria of Trebizond , was a Byzantine Empress consort by marriage to the Byzantine emperor John VIII Palaiologos (r. 1425–1448).
She was the last empress consort of the Byzantine Empire.
She was one of three daughters of Alexios IV of Trebizond and Theodora Kantakouzene.
Konstancja Lubomirska
Princess Konstancja Lubomirska( ca. 1618–1646) was a Polish noble lady.
Konstancja married Kazimierz Franciszek Czarnkowski on 1 February 1637 in Kraków.
She was the mother of Adam Uriel Czarnkowski, grandmother of Zofia Anna Czarnkowska, Great- grandmother of Katarzyna Opalinska and the great- great- grandmother of Maria Leszczyńska.
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.
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.
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.
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.

Question: Who is the paternal grandmother of Maria Of Trebizond?
Answer: Gulkhan-Eudokia of Georgia