Pliny, Natural History34.57, suggests that Myron was also in some sense self-taught: "Hageladae et ipsum discipulum." The account of Myron directly follows Pliny's account of Polyclitus of Sicyon, also a pupil of Ageladas.
britannica.com
Blumberg, Naomi. "Polyclitus". Encyclopedia Britannica. Retrieved 25 June 2023.
uchicago.edu
artflsrv02.uchicago.edu
Pausanias' references (e.g. 6.8.4, etc.) seem to suggest that he habitually signed his works "Myron the Athenian": Eleutherae became an Athenian demos in 460 BC.