Theodora of Trebizond
Theodora Megale Komnene (before 1253 – after 1285) was a daughter of the Trapezuntine emperor Manuel I by Rusudan, a Georgian princess. In 1284, backed by David VI Narin of Imereti, she seized the crown from her half-brother John II and ruled as empress for about a year.
She struck her own silver and bronze coins, the only reigning empress of Trebizond to do so. John II soon defeated her and recovered the throne, and she went into exile in her mother's Georgia.