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.
Alexander of Trebizond
Alexander Komnenos or Skantarios Komnenos was a co-emperor of the Empire of Trebizond, first with his father Alexios IV of Trebizond then, after several years in exile, with his brother John IV.
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.
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.
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.
Anna of Trebizond
Anna Anachoutlou( died 1342) was Empress of Trebizond from July 17, 1341, to September 4, 1342.
Anna was the elder daughter of Emperor Alexios II of Trebizond and his Georgian wife, Djiadjak Jaqeli.
John VIII Palaiologos
John VIII Palaiologos or Palaeologus (18 December 1392 – 31 October 1448) was the penultimate reigning Byzantine Emperor, ruling from 1425 to 1448.
Maria of Gothia
Maria of Gothia was the first wife of David of Trebizond, last Emperor of Trebizond, whom she married in 1426.
Theodred II (Bishop of Elmham)
Theodred II was a medieval Bishop of Elmham.
The date of Theodred's consecration unknown, but the date of his death was sometime between 995 and 997.
Pankratios of Trebizond
Pankratios or Pangratios was the first Metropolitan bishop of Trebizond following the Ottoman conquest of the Empire of Trebizond in 1461.
Nothing is known about Pankratios' origin or early career prior to his appointment as metropolitan.
The see had been vacant since the capture of Trebizond and the incorporation of the Empire of Trebizond to the Ottoman Empire in 1461, as the bulk of the Trapezuntine upper classes, including the secular nobility and the ecclesiastical hierarchy, were transferred to the Ottoman capital, Constantinople.
It was not until ca. 1472 that the vacancy was addressed.
This was partly the result of the appointment of the Trapezuntine Symeon I as Patriarch of Constantinople, but owed more to political considerations on the part of the Ottoman Sultan, Mehmed II: the Christians of the Pontus region around Trebizond had been restive against Ottoman rule, and were encouraged by the neighbouring Aq Qoyunlu sultan Uzun Hassan.
The latter was linked through family ties with the former imperial house of Trebizond, and lent his support to a scion of that house, Alexios Komnenos.
In order to counteract the threat of a rebellion, the Sultan elevated Symeon to the patriarchal throne, and he immediately appointed Pankratios to the metropolitan throne of Trebizond.
It appears, however, that the latter was unable to satisfy the Sultan's expectations about calming the province, and already after a few months Mehmed II demanded his replacement.
Pankratios was succeeded by Dorotheos II, and nothing further is known of him thereafter.

Question: When did Maria Of Trebizond's husband die?
Answer: 31 October 1448