Sicyon

Pausanias: The Sicyonians, the neighbours of the Corinthians at this part of the border, say about their own land that Aegialeus was its first and aboriginal inhabitant, that the district of the Peloponnesus still called Aegialus was named after him because he reigned over it, and that he founded the city Aegialea on the plain. Their citadel, they say, was where is now their sanctuary of Athena; further, that Aegialeus begat Europs, Europs Telchis, and Telchis Apis¹.

See:

1. Pausanias:Description of Greece  II.5.6-II.8.1
2. Audrey Griffin: Sikyon. Clarendon Press, Oxford 1982
3. https://www.ascsa.edu.gr/uploads/media/Sikyon_Sample.pdf 

References

1. ↑Pausanias, II.5,6