Neboulos (Greek: Νέβουλος) was a South Slavic military commander in the service of the Byzantine emperor Justinian II (r. 685–695 and 705–711), who defected with many of his men to the Arabs during the crucial Battle of Sebastopolis.
From them, he recruited a special military corps, allegedly 30,000 strong, which was called in Greek λαός περιούσιος, "the chosen people".
[1][3] In 692/3, after the corps' training had been completed, they were employed en masse by Justinian II in a major campaign against the Umayyads under the strategos of the Anatolics, Leontios.
[1][3][4] Some sources report, probably with great exaggeration, how thereafter Justinian took his revenge on the remaining Slavs: he disbanded the corps, and killed or sold into slavery many of its men, as well as the families of the deserters.
Neboulos and his men, on the other hand, were settled by the Umayyads in Syria, and were employed in subsequent Arab forays into Byzantine-held Asia Minor.