Mamia may have been the Georgian ruler who defeated the Burgundians at Batumi and imprisoned their leader, Geoffroy de Thoisy, in 1445. Thoisy was only released through the good services of the Trapezuntine emperor John IV Megas Komnenos. The Gurieli, whose lordship lay between the Trapezuntine theme of Lazia and Mingrelia, had close ties with the Komnenoi. David Komnenos sent his wife, Helena, to Mamia for safety just before the Ottoman military advanced to Trebizond in 1461. The chronicle by Laonikos Chalkokondyles suggests that Mamia may have been related by marriage in some otherwise unrecorded way to the Trapezuntine Komnenoi. According to the historian Cyril Toumanoff, this means that Mamia was married to a daughter of David of Trebizond.