When Boreas seized Orithyia as she played by the Ilissus and lay with her, she bore him two daughters, Cleopatra and Chione, and the winged sons Zetes and Calais. Chione thus stands within the storm-born brood of the North Wind, sister to the brothers who would sail with Jason and die in the chase of the Harpies.2Pseudo-Apollodorus — Bibliotheca 3.15.2

Chione had connexion with Poseidon and gave birth to Eumolpus unknown to her father; that the affair might not be detected, she flung the infant into the deep. But Poseidon took up the child, carried him to Ethiopia, and gave him to Benthesicyme, his own daughter by Amphitrite, to rear — and so the boy thrown to the sea was saved by the sea's own lord.3Pseudo-Apollodorus — Bibliotheca 3.15.4

Pausanias preserves the same descent from another quarter: the Eleusinians and Athenians agreed in identifying the tomb of Eumolpus, who came from Thrace, son of Poseidon and Chione, and Chione, they said, was daughter of the wind Boreas and of Orithyia — Homer, he notes, says nothing of Eumolpus' family but styles him only 'manly.'4Pausanias — Description of Greece 1.38.2

Apollodorus and Pausanias name her only as Boreas' daughter without a nymph sub-class in our seven lenses; `kinds` is therefore omitted here by the same policy as Calypso and Eidothea until a sourced tag lands. She is distinct from `chione-daedalion`, Daedalion's daughter and mother of Autolycus and Philammon.5Pseudo-Apollodorus · Pausanias — Bibliotheca 3.15.2, 3.15.4; Description of Greece 1.38.2