Uthman ibn Naissa (Arabic: عثمان بن نيساء) better known as Munuza, was an Umayyad governor depicted in different contradictory chronicles during the Muslim conquest of Hispania.
One account says that he was the governor of Gijón (or possibly León) after Musa ibn Nusayr raided northwestern Iberia (including the region of Asturias but not Cantabria in modern Spain) during the first decade of the Umayyad conquest of Hispania in the early 8th century.
The historical context can only be speculated, but Pelayo may have tried to secure alliances and a preferential status among the local nobles through the marriage of his sister to the new power in the area, as the Asturian kings would later do with Basques in Pamplona and all of the Christian families did with the Caliphate in Córdoba.
After the loss of a Muslim garrison out on a punitive expedition, Munuza may have taken undisputed control of the Asturian coastal region, but kept court in the western districts closer to dominated and occupied Galicia.
Other contemporary chronicles speak of "Munuza", a distorted name standing for Uthman ibn Naissa, a Berber commander in charge of operations in the Umayyad-occupied eastern Pyrenees, Cerdanya, a decade later.