Demetrius in the Bible Encyclopedia - ISBE

de-me'-tri-us (Demetrios, "of" or "belonging to Demeter," an ordinary name in Greece): (1) Demetrius I, surnamed Soter ("saviour"), was the son of Seleucus IV (Philopator). He was sent as a boy to Rome, by his father, to serve as a hostage, and remained there quietly during his father's life. He was detained also during the reign of his uncle, ANTIOCHUS EPIPHANES (which see) from 175 to 164 BC; but when Antiochus died Demetrius, who was now a young man of 23 (Polyb. xxxi.12), chafed at a longer detention, particularly as his cousin, Antiochus Eupator, a boy of 9, succeeded to the kingdom with Lysias as his guardian. The Roman Senate, however, refused to listen to his plea for the restoration to Syria, because, as Polybius says, they felt surer of their power over Syria with a mere boy as king...