Demetrios Angelos Doukas

Demetrios Angelos Doukas (born c. 1220) was the youngest son of Theodore Komnenos Doukas. On his brother John's death in 1244 he succeeded as ruler of Thessalonica, and the Nicaean emperor John III confirmed him with the title of Despot.

Young and dissolute, he won little loyalty from its leading families, who conspired to hand Thessalonica to Nicaea. In 1246 Nicaean troops were admitted through a gate and annexed the city. Demetrios surrendered through his sister Irene's intercession and was exiled to Lentiana, where he probably died.