PARTHENIOS was a River-God of Paphlagonia in Anatolia (modern Turkey).

The most important neighbouring rivers were the Halys in the east, and Nymphaios to the west.

Hesiod, Theogony 337 ff (trans. Evelyn-White) (Greek epic C8th or 7th B.C.) :
"Tethys bore to Okeanos the swirling Potamoi (Rivers) . . . Parthenios, Euenos and Ardeskos, and Skamandros, who is holy [in a list of rivers]."

Homerica, Fragment of Unknown Position 17 (trans. Evelyn-White) (Greek epic B.C.) :
"[The river Parthenios] flowing as softly as a dainty maiden goes."

Quintus Smyrnaeus, Fall of Troy 6. 464 ff (trans. Way) (Greek epic C4th A.D.) :
"Agamestor's son Kleitos [an ally of the Trojans], a bright-haired Nymphe had given him birth beside Parthenios [i.e. the Paphlagonian river], whose quiet stream fleets smooth as oil through green lands, till it pours its shining ripples to the Euxine sea."

Sources:

• Hesiod, Theogony - Greek Epic C8th-7th B.C.
• Homerica, Fragments - Greek Epic B.C.
• Quintus Smyrnaeus, Fall of Troy - Greek Epic C4th A.D.