The Alcmaeonidae or Alcmaeonids ( ; Attic: ) were a wealthy and powerful noble family of ancient Athens, a branch of the Neleides who claimed descent from the mythological Alcmaeon, the great-grandson of Nestor. In the 7th through 5th centuries BC, the Alcmaeonidae played a significant role in the developments and events that occurred in Athens. Such developments included overthrowing an Athenian tyrant, helping to lay the foundations of Athenian democracy, and having generals for Athens during the Peloponnesian War. The Alcmaeonidae were mentioned frequently throughout Herodotus' The Histories, and many played a key role in shaping Athens. The first prominent Alcmaeonid was Megacles, who was exiled from the city and given a curse on him and his family. Furthermore, there was Cleisthenes, who became known as "the father of Athenian democracy" by numerous scholars and historians. Another famous Alcmaeonid was Pericles, whom Thucydides would later call "the first citizen of Athens," as well as Alcibiades, who switched sides numerous times during the Peloponnesian War, and would end up being the last of the notable Alcmaeonidae. The main aristocratic rival of the Alcmaeonidae in the 6th and 5th centuries BC were the Peisistratids. Early background and history Unlike many aristocratic families at the time, the Alcmaeonidae were not named after a mythological founder, but rather from an historical figure. In this case, the founder was Alcmaeon, father of Megacles. Similar to other aristocratic families however, was that the Alcmaeonidae did employ the tradition of reusing the name of the maternal or paternal grandfather in the family. As a result, there are numerous Megacles, Alcmaeon, and Cleisthenes names in this family. The first noteworthy Alcmaeonid was Megacles, son of Alcmaeon, who was the Archon Eponymous of Athens in the 7th century BC. He was responsible for killing the followers of Cylon of Athens during the attempted coup in 632 BC, as Cylon had taken refuge as a suppliant at the temple of Athena, even though Megacles had promised their safety. In essence, he went against his word. As a result of their actions, Megacles and his Alcmaeonid followers were the subject of an ongoing curse and were exiled from the city. Even the bodies of buried Alcmaeonidae were dug up and removed from the city limits. Alcmaeonids were allowed back into the city in 594 BC, during the archonship of Solon, and were able to recover significant influence. During the tyranny