Mariam (Georgian: მარიამი) was a daughter of King Bagrat IV of Georgia (r. 1027–1072) by his Alan wife Borena.
Mariam was mentioned in the Georgian annals on one occasion only as being present at the deathbed of her father Bagrat IV in November 1072.
[1] 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.
[1] Professor Cyril Toumanoff,[2] 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.
Thus, Gregory's engagement with a Komnenid princess was quietly broken off as they were now considered close relatives and according to civil and the ecclesiastical laws, such marriages were forbidden.