Philo-Judaeus. A Hellenized Jew of Alexandria, a famous historian and philosopher of the first century, born about the year 30 B. C., and died between the years 45 and 50 A. D. Philo's symbolism of the Bible is very remarkable. The animals, birds, reptiles, trees, and places mentioned in it are all, it is said, "allegories of conditions of the soul, of faculties, dispositions, or passions; the useful plants were allegories of virtues, the noxious of the affections of the unwise and so on through the mineral kingdom; through heaven, earth and stars; through fountains and rivers, fields and dwellings; through metals, substances, arms, clothes, ornaments, furniture, the body and its parts, the sexes, and our outward condition." (Dict. Christ. Biog.) All of which would strongly corroborate the idea that Philo was acquainted with the ancient Kabbala.
Source: H.P.Blavatsky - The Key to Theosophy, The theosophical glossary