'Doukas the Roman'; died 11 August 919) was a Byzantine Greek[1] who served the Abbasid Caliphate as governor of Egypt in 915–919.
He was installed as governor of Egypt in 915 by the Abbasid commander-in-chief Mu'nis al-Muzaffar, as part of his effort to stabilize the situation in the country and expel a Fatimid invasion that had taken Alexandria.
[3] Although Dhuka had the garrison of Alexandria reinforced following the sack of Barqa, the arrival of the Fatimid expeditionary force in July 919 caught him by surprise.
[4] Dhuka's efforts to repel the new invasion were hampered by the reluctance of the provincial garrison at Fustat to fight, exacerbated by the habitual delays in their pay, forcing him to rely on volunteers at first.
Soon after, however, the new fiscal administrator for Egypt, al-Husayn al-Madhara'i, arrived with sufficient funds to pay the regular troops their arrears.