Philo of Alexandria (Ancient Greek: Φίλων, Hebrew: יְדִידְיָה הַכֹּהֵן, 20 BCE – c. 50 CE), also called Philo Judaeus, was a Hellenistic (Greek Speaking) Jewish philosopher who lived in Alexandria (named after the Greek king, Alexander the Great), Egypt. And was a Contemporary of Josephus.
Philo and his statements on the Septuagint:
See this portion of the excellent book
The Oxford Handbook of the Septuagint
Edited by Alison G. Salvesen and Timothy Michael Law