Wikipedia
Peisistratos (; ; died 528/7 BC), Latinized Pisistratus, the son of Hippocrates, was a ruler of ancient Athens during most of the period between 561 and 527 BC. His legacy lies primarily in his institution of the Panathenaic Festival, historically assigned the date of 566 B.C., and the consequent first attempt at producing a definitive version of the Homeric epics. Peisistratos' championing of the lower class of Athens, the Hyperakrioi, (see below) is an early example of populism. While in power, Peisistratos did not hesitate to confront the aristocracy, and he greatly reduced their privileges, confiscated their lands and gave them to the poor, and funded many religious and artistic programs.
Peisistratus was the brother-in-law of Cleisthenes. However, Peisistratus was much older.
Peisistratids is the common term for the three tyrants who ruled in Athens from 546 to 510 BC, namely Peisistratos and his two sons, Hipparchus and Hippias.