Noun
Alcmaeonid (plural Alcmaeonids)
(historical) A member of the Alcmaeonidae (Ἀλκμαιωνίδαι), a powerful noble family of ancient Athens who claimed descent from the mythological Alcmaeon.
Taking advantage of his incapacitation, the powerful Alcmaeonid family arranged for him to be prosecuted. Source: Internet
He was descended, through his mother, from the powerful and historically influential Alcmaeonid family. Source: Internet