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In page Maria of Gothia:

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The children of David have been attributed variously to Maria or Helena by various genealogies. They included Basil, Manuel and George Komnenos, princes decapitated by orders of Mehmed II of the Ottoman Empire in 1463. Their sister Anna married first Mohammed Zagan Pasha, Beglerbeg of Macedonia and secondly to Sinan Beg, son of Ilvan Beg. Another daughter reportedly married Mamia II, Prince of Guria. Cyril Toumanoff gives Maria, a third daughter, as wife of Constantine Mourousis.[citation needed]