While Judaea, under the reign of Antiochus IV Epiphanes (175 – 163 B.C.E.), was being racked by the struggles between “traditionalists” and “Hellenists,” by the persecutions, and by the revolt of the Maccabees, the Jewish diaspora in Egypt had attained the apogee of its successful trajectory, under the reign of Ptolemy VI Philometor (185 – 145 B.C.E.). The philosopher Aristobulos, dedicated his work on the Law of Moses to this king. In the letter quoted below (2 Macc. 1:10), Aristoboulos was addressed as the king’s “private tutor” (didaskalos).
Source: Joseph Mélèze Modrzejewski. The Jews of Egypt. (p. 122)