Helena Doukaina Angelina
Helena Doukaina Angelina was a Greek noblewoman of Thessaly, daughter of its sebastokrator John I Doukas. Around 1273 to 1276 she married Stefan Uroš II Milutin of Serbia, who became king in 1282.
Milutin abandoned her around 1283. She may have been the mother of Stefan Konstantin, later a claimant to the Serbian throne, and seems to have returned to Greece.