or PASIADAS (Πασίδας or Πασιάδας), an Achaean, was one of the deputies sent by the Achaeans to Ptolemy Philometor, to congratulate him on his attaining to manhood, B. C. 170. During their stay in Egypt, they interposed their good offices to prevent the further advance of Antiochus Epiphanes, who had invaded the country, and even threatened Alexandria itself, but without etfect. (Plb. 28.10, 16.)