Phyle (Greek: φυλή, romanized: phulē, lit. 'tribe, clan'; pl. phylai, φυλαί; derived from Greek φύεσθαι, phyesthai lit. 'to descend, to originate') is an ancient Greek term for tribe or clan.[1] Members of the same phyle were known as symphyletai (Greek: συμφυλέται) meaning 'fellow tribesmen'.[2] During the late 6th century BC, Cleisthenes organized the population of Athens in ten phylai (tribes), each consisting of three trittyes ("thirtieths"), with each trittys comprising a number of demes. Tribes and demes had their own officers and were self-administered.[3] Some phylai can be classified by their geographic location, such as the Geleontes, the Argadeis, the Hopletes, and the Agikoreis in Ionia, as well as the Hylleans, the Pamphyles, the Dymanes in Doris.