Mariam, daughter of Bagrat IV of Georgia

Mariam (Georgian: მარიამი) was a daughter of King Bagrat IV of Georgia (r. 1027–1072) by his Alan wife Borena. She was possibly married, as the second wife, to the Byzantine dignitary Theodore Gabras.
Mariam is mentioned in the Georgian annals on one occasion only as being present at the deathbed of his father Bagrat IV in November 1072. The name Mariam (Maria) was also borne—as a Byzantine empress—by Bagrat's other, better-documented daughter who was born as Martha in Georgia.
Professor Cyril Toumanoff, a student of the medieval Caucasian genealogies, identifies Mariam with the anonymous "Alan" woman of "very good birth" known from Anna Komnene's Alexiad to have married, as his second wife, the Byzantine nobleman Theodore Gabras, dux of Trebizond in 1091. This lady was a cousin of Eirene, another bride from Georgia at the Byzantine court, who was married to the sebastokrator Isaac Komnenos, brother of the emperor Alexios I Komnenos. Eirene was...