Mopsus

Mopsus (Greek: Μόψος, Mopsos) was the name of one of two famous seers in Greek mythology; his rival being Calchas. A historical or legendary Mopsos or Mukšuš may have been the founder of a house in power at widespread sites in the coastal plains of Pamphylia and Cilicia (in today's Turkey) during the early Iron Age.

Mopsus, a celebrated seer and diviner, was the son of Manto, daughter of the mythic seer Tiresias, and of Rhacius of Caria or of Apollo himself, the oracular god. Greeks of the Classical age accepted Mopsus as a historical figure, though the anecdotes concerning him bridge legend and myth.

Mopsus (and perhaps a tradition of his heirs, like the Melampodidae, the Iamidae from Olympia or the Eumolpidae at Eleusis) officiated at the altars of Apollo at Klaros, which he founded; at Klaros the tradition was that he had been the son of a daughter of the seer Teiresias named Manto, literally "seeress". His unerring wisdom and discernment gave rise to the ancient Greek proverb, "more certain than Mopsus". He distinguished himself at the siege of Thebes; but he was held in particular veneration at the court of Amphilochus at Colophon on the Ionian coast of Asia Minor, adjacent to Caria.

...
Wikipedia