Astacus
Ἄστακος
(Ἄστακος).
1. A son of Poseidon and the nymph Olbia, from whom the town of Astacus in Bithynia, which was afterwards called Nicomedeia, derived its name. (Arrian. apud Steph. Byz. s. v.; Paus. 5.12.5; Strab. xii. p.563.)
From William Smith (ed.), Dictionary of Greek and Roman Biography and Mythology. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.