Thomas I Komnenos Doukas

Thomas I Komnenos Doukas (c. 1285–1318) was the son of Nikephoros I of Epirus and Anna Kantakouzene. In 1290 Andronikos II made him despot, and after his father's death around 1297 he inherited Epirus under his mother's regency, which thwarted the claim of his sister Thamar and her Angevin husband Philip of Taranto.

A new Angevin invasion in 1307 ended in a compromise that ceded many recovered fortresses back to Philip. Thomas later married Anna Palaiologina, daughter of Emperor Michael IX, and a quarrel with Byzantium brought a raid on Arta in 1315. In 1318 he was murdered by his nephew, Nicholas Orsini of Cephalonia.