THE NYMPHAI OGYGIAI were the Naiad Nymphs of the four springs of the mythical island of Ogygia. They were handmaidens of the local goddess Nymph Kalypso (Calypso).
Homer, Odyssey 5. 20 ff (trans. Shewring) (Greek epic C8th B.C.) :
"Around the entrance [of the cavern of Kalypso (Calypso) on Ogygia] a wood rose up in abundant growth--alder and aspen and fragrant cypress . . . Trailing over the cavern's arch was a garden vine that throve and clustered; and here four springs began near each other, then in due order ran four ways with their crystal waters. Grassy meadows on either side stood thick with violet and wild parsley . . . [Kalypso] sat down herself facing the king [Odysseus] while her handmaids [Naiades of the four springs of the cavern] served her with nectar and ambrosia. He and she stretched out their hands to the dishes there; but when they had eaten and drunk their fill."
- Homer, The Odyssey - Greek Epic C9th-8th BC