 Complete the following phrase:  Niketas is only mentioned by the De Administrando Imperio, a work compiled in the middle of the 10th century by Constantine VII Porphyrogennetos. According to it, he was the son of Ioube Ἰούβη, a Hellenized form of Ayyub. Along with his older brother Chase Hasan he was a slave of the patrikios Damian, the parakoimomenos of Emperor Michael III, implying that they had been captured as prisoners of war during a 