DAULIS was the Naiad Nymph of a well or fountain in the town of Daulis in Boiotia, central Greece. She was a daughter of the local river-god Kephisos (Cephisus).

Pausanias, Description of Greece 10. 4. 7 (trans. Jones) (Greek travelogue C2nd A.D.) :
"They say that the name of the city [of Daulis in Phokis] is derived from Daulis, a Nymphe, the daughter of Kephisos."

Sources:

• Pausanias, Guide to Greece - Greek Geography C2nd AD