In plural. The family or supporters of the Athenian tyrant Pisistratus; specifically his sons, Hippias and Hipparchus.
Of, denoting, or relating to Pisistratus, his supporters, or his family, especially his sons. Also: of or relating to the revision of Homeric poems attributed to Pisistratus.
Early 17th century; earliest use found in Richard Knolles (d. 1610), historian and translator. From classical Latin Pīsistratidae, the name given to Hippias and Hipparchus, sons of Pisistratus from ancient Greek Πεισιστρατίδαι from Πεισίστρατος (classical Latin Pīsistratus), the name of Pisistratus, tyrant of Athens in the 6th century b.c. + -ίδαι, plural of -ίδης; originally via Middle French, French Pisistratides.