What is "pheroras"

Pheroras (Φερώρας; Pherṓras). Youngest son of Antipater I and Cypros I and younger brother of Herod the Great, born c. 68 BC probably in Marissa (Idumaea), died c. 5 BC. His first marriage was to Salampsio,(the daughter of Mariamme I and his elder brother Herod the Great), his second was to a "slave girl", of whose "charms" he was "overcome" Pheroras was a close comrade-in-arms of his brother Herod: on whose commission he restored the fortress of Alexandreum to the north of Jericho.