Hesiod

Theogony

337–355

And Tethys bore to Ocean eddying rivers, ... Also she brought forth a holy company of daughters ... [355] Cerceis lovely of form, and soft eyed Pluto [Πλουτώ],

Homeric Hymn

2.5

[Persephone] was playing with the deep-bosomed daughters of Oceanus

2.418–423

[Persephone:] All we were playing in a lovely meadow, Leucippe and Phaeno and Electra and Ianthe, Melita also and Iache with Rhodea and Callirhoe [420] and Melobosis and Tyche and Ocyrhoe, fair as a flower, Chryseis, Ianeira, Acaste and Admete and Rhodope and Pluto and charming Calypso; Styx too was there and Urania and lovely Galaxaura

Smith

s.v. Pluto 1

（Πλουτώ).

1. A daughter of Oceanus and Tethys, and one of the playmates of Persephone. (Hes. Th. 355; Hom. Hymn. in Cer. 422.)