Ptolemy VI Philometor
The Greek translator states in his preface that he was the grandson of the author, and that he came to Egypt in the thirty-eighth year of the reign of "Euergetes". This epithet was borne by only two of the Ptolemies. Of these, Ptolemy III Euergetes reigned only twenty-five years (247–222 BCE) and thus Ptolemy VIII Euergetes must be intended; he ascended the throne in the year 170 BCE, together with his brother Ptolemy VI Philometor, but he soon became sole ruler of Cyrene, and from 146 to 117 BCE held sway over all Egypt. He dated his reign from the year in which he received the crown (i.e., from 170 BCE). The translator must therefore have gone to Egypt in 132 BCE.