pos-i-dō´ni-us (ΠωσιδωÌνιος, PoÌ„sidoÌ„Ìnios, al. ΠοσιδοÌνιος, PosidoÌnios and ΠοσειδωÌν, PoseidoÌ„Ìn): One of the three envoys sent by the Syrian general Nicanor to treat with the Jews under Judas during his invasion of Judea, 161 BC (2 Macc 14:19). In 1 Macc 7:27 ff, proposals are sent by Nicanor to Judas, but no envoys are named, and it is there asserted in contradiction to 2 Maccabees that Judas broke off the negotiation because of the treacherous designs of Nicanor.