Posidonius

POSIDONIUS pŏs’ ĭ dō’ nĭ əs (Ποσιδώνιος, Posidon, i.e. a man dedicated to the god of the sea, Posidon [or Neptune]). Mentioned in 2 Maccabees 14:19 as one of three envoys sent by the Syrian general Nicanor to Judas the Maccabee with authority to propose and accept a truce.

International Standard Bible Encyclopedia (1915)

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.