Halirrhothius (/ˌhælɪˈroʊθiəs/; Ancient Greek: Ἁλιρρόθιος, romanized: Halirrhóthios, lit. 'sea-foam'[1]) was the Athenian son of Poseidon and Euryte[2] or Bathycleia[3] in Greek mythology. He was also called the son of Perieres and husband of Alcyone who bore him two sons, Serus and Alazygus.[4] Another son of Halirrhothius, Samos of Mantinea was the victor of the four-horse chariot during the first Olympic games established by Heracles.[5]
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was invoked but never defined (see the help page).