Critodemus was a Greek astrologer. "One of the earliest known authors on astrology", he was used as a source by Pliny and Vettius Valens among others. His dates are uncertain but 1st century AD at the latest.
References
Book: Neugebauer . H. B . Van Hoesen . H. B. . Greek Horoscopes, Volume 48 . 1987 . 185 . The American Philosophical Society . Philadelphia . 9780871690487 . 59-11559 .
