Career
Born ca. 1297, Demetrios was the youngest of Andronikos II"s sons. In ca. 1304, he was sent to the court of the Serbian ruler Stephen Uroš II Milutin, intended to become his successor. His stay there was short, however, and he soon returned to Constantinople.
In 1306 he was named to the highest court rank, that of Despot.
In 1327–1328, during the last stage of the civil war, he served as governor of Thessalonica. Nothing more is known of him after 1343.
By her he had a daughter, the future empress Irene, and at least one other, unnamed, child.