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.
Alexios II of Trebizond
Alexios II Megas Komnenos or Alexius II (Sept./Dec. 1282 – 3 May 1330), was Emperor of Trebizond from 1297 to 1330.
He was the elder son of John II and Eudokia Palaiologina.
Alexios proved to be a skillful and energetic ruler, under whose rule the Empire of Trebizond reached the climax of its prosperity.
He rebuffed the inroads of the marauding Turks, and adequately handled the encroachment of Genoa and Venice.
He also cultivated the arts and sciences at his court serving as a patron to the Byzantine astronomer Gregory Choniades and the scholar Constantine Loukites.
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."
Jiajak Jaqeli
Jiajak Jaqeli was the Empress consort of Alexios II of Trebizond.
Theodora Kantakouzene
Theodora Komnene Kantakouzene( c. 1340 – after 1390) was the Empress consort of Alexios III of Trebizond.
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 Palaiologina
Eudokia Palaiologina or  (c. 1265 – 18 September 1302) was the third daughter of Byzantine Emperor Michael VIII Palaiologos and his wife, Theodora, a grandniece of Emperor John III Doukas Vatatzes of Nicaea.
In 1282 Eudokia married in Constantinople John II Megaskomnenos, Emperor of Trebizond with whom she had two sons, Alexios and Michael.
In 1298, after her husband's death and the ascension of her son Alexios II, she returned to her brother's court at Constantinople taking her younger son Michael with her.
Andronikos II Palaiologos received his sister, planning to use her to seal a diplomatic settlement with Stefan Uroš II Milutin, King of Serbia: the hand of Eudokia in return for a negotiated peace.
King Stefan was agreeable to this proposal, for one of his three wives had recently died. "
But nothing that Andronikos could do would influence his sister to entertain the prospect of life with a lecherous barbarian in the wilds of Serbia," writes Donald M. Nicol.
King Stefan was forced to settle for Andronikos' daughter Simonida by his second wife, Irene of Montferrat.
Meanwhile, Alexios II decided for himself to marry Djiadjak Jaqeli, a Georgian princess.
His uncle Andronikos II, who had been appointed his guardian by his father, wanted this marriage annulled; he had planned for Alexios to marry the daughter of the high court official Nikephoros Choumnos.
Eudokia used the pretext of inducing her son to dissolve the marriage to obtain her brother's permission to return to Trebizond in 1301; upon arriving, she instead advised her son to keep his Georgian wife.
Eudokia died in the following year, and William Miller speculates she was buried in the church of Saint Gregory of Nyssa.
Anthony Bryer has proposed that a Eudokia, who became a nun by the monastic name Euphemia, mentioned in a painted inscription recorded by Fallmerayer from the Panagia Theoskepastos Monastery, may have been Eudokia Palaologina.
This Eudokia has not been satisfactorily proven to be a member of the house of the Great Komnenoi, and Bryer offers a number of objections to any identification.
He notes that there is "a strong independent local nineteenth-century tradition" that Eudokia founded the church of St. Gregory of Nyssa before her death.
Lastly, Bryer notes that "it would not be surprising if she would have wished to put not only distance but a nun's veil between herself and her brother's ruthless and alarming marital plans (which included Mongol and Turkish alliances for other female members of his family) before she died in 1302."
Pseudo-Alexios II
Pseudo- Alexios II was the most famous among several pretenders to the throne of the Byzantine Empire who appeared in the early reign of Isaac II Angelos( r. 1185- 1195 and 1203 – 1204).
He claimed to be the Emperor Alexios II Komnenos, who had been murdered in 1183.
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.

Question: Who is Alexios Ii Of Trebizond's maternal grandfather?