SINOPE was the Naiad Nymph of the main fountain or spring of the Greek colony of Sinope in Assyria or Pontus (north-central Anatolia) on the Black Sea. She was a daughter of the Greek river-god Asopos who was abducted to the region by Apollon.

Corinna, Fragment 654 (trans. Campbell, Vol. Greek Lyric IV) (C5th B.C.) :
"Of these nine daughters [of Asopos] . . . Leto's son [Apollon] is in possession of Sinope and Thespia."

Bacchylides, Fragment 9 (trans. Campbell, Vol. Greek Lyric IV) (C5th B.C.) :
"The bright-belted daughters [of Asopos] whom gods settled with happy fortunes as founders of invoilate cities. Who does not know of the well-built town of . . . fair-robed Sinope."

Apollonius Rhodius, Argonautica 2. 944 ff (trans. Rieu) (Greek epic C3rd B.C.) :
"The Assyrian coast, where Zeus himself had once given a home to Sinope daughter of Asopos, granting her the boon of virginity. He was trapped by his own promise. In his passion for the girl he had solemnly sworn to fulfil her dearest wish, whatever that might be; and she very cleverly had said, ‘I wish to remain a virgin.’ By the same ruse the outwitted Apollon when he made lover to her; and the River-God Halys as well. Men fared no better than the gods; this woman never was possessed by any lover."

Diodorus Siculus, Library of History 4. 72. 1-5 (trans. Oldfather) (Greek historian C1st B.C.) :
"Asopos made his home in Phlios [Sikyonia], where he married Metope, the daughter of Ladon, to whom were born two sons, Pelasgos and Ismenos, and twelve daughters, Korkyra and Salamis, also Aigina, Peirene, and Kleone, then Thebe, Tanagra, Thespeia, and Asopis, also Sinope, and finally Ornia and Khalkis . . .
Sinope, was seized by Apollon and carried off to the place where now stands the city of Sinope, which was named after her, and to her and Apollon was born a son Syros, who became king of the Syrians, who were named after him."

Valerius Flaccus, Argonautica 5. 109 ff (trans. Mozley) (Roman epic C1st A.D.) :
"Embosoming Assyrian bays stands rich Sinope [a city on the southern shores of the Black Sea], once a Nympha and onw who mocked Jove's [Zeus'] ardent wooing, unmoved by heavenly suitors; not Halys [the local River-God] only or Apollo were deceived by the trickery of the Nympha they loved."

Sources:

• Greek Lyric IV Corinna, Fragments - Greek Lyric C5th BC
• Greek Lyric IV Bacchylides, Fragments - Greek Lyric C5th BC
• Apollonius Rhodius, The Argonautica - Greek Epic C3rd BC
• Diodorus Siculus, The Library of History - Greek History C1st BC
• Valerius Flaccus, The Argonautica - Latin Epic C1st AD

Other references not currently quoted here: Scholiast on Apollonius Rhodius 2.964