'derived from αἰγιαλός aigialos 'beach, sea-shore') also Aegealeus, or Egialeus, in classical Greek semi-mythical historiography was considered the original settler of the Peloponnese and the founder and first ruler of the city-state of Aegialea, later known to history as Sicyon.
[1][2][3][4] The primary source for the early history of Sicyon was the writing of Castor of Rhodes, known from excerpts cited or utilized in later authors, such as Pausanias, Africanus, Eusebius, Jerome, and George Syncellus.
Castor stated that Aegialeus' reign as first king of Sicyon lasted for 52 years,[2] a few generations before Inachus founded Argos; that the Peloponessus was called Aegialea after him; and that he was succeeded by Europs.
[7] The work Bibliotheke ("The Library") also cited Castor, however it presented a distorted account giving the primacy to Argos rather than Sicyon, with an altogether different genealogy making Aegialeus a son of Inachus.
[8][9] In his Description of Greece,[10] one of the earliest sources to make use of Castor, Pausanias wrote: In the work Bibliotheke ("The Library"),[11] we read: