Abu Sa'id Uthman ibn Abi al-Ula (Arabic: ابو سعید عثمان بن أَبِي العلا‎; also Don Uzmén in Castilian sources;[1] died 1330) was a Marinid prince who led an unsuccessful rebellion aiming to capture the throne, and fled to the Nasrid Emirate of Granada in its aftermath. There he served as the Commander (shaykh al-ghuzat) of the Volunteers of the Faith of Granada, and became one of the most important political figures of the Nasrid realm.