In Greek mythology, Celaeno (Ancient Greek Κελαινώ, "the dark one") is a Harpy — in Hyginus the third daughter of Thaumas beside Aellopus and Ocypete, and in Virgil the prophetic Harpy Aeneas meets at the Strophades. Hesiod and Apollodorus name only Aello and Ocypete; the atlas keeps the two-/three-name dispute on the collective harpies node. Distinct from Celaeno the Pleiad and other namesakes.
Adapted from Wikipedia, "Celaeno" · CC BY-SA 4.0
I.Dark Harpy
Hesiod and Apollodorus list two Harpies, Aello and Ocypete, daughters of Thaumas and Electra. Hyginus raises the count to three — Aellopus, Celaeno, and Ocypete — among those driven from Phineus by the Boreads. Virgil's Aeneid makes Celaeno the speaking Harpy who prophesies to Aeneas that the Trojans will hunger until they eat their tables.
The collective node harpies holds the two-name versus three-name dispute; this node is the dark third named in Hyginus and Virgil.
II.Homonyms
Wikipedia's Celaeno page lists the Pleiad, a Danaid, a Phocian princess, an Amazon, and others. The atlas id celaeno-harpy is the Harpy alone; celaeno-pleiad is the Atlas daughter.