Of Thelpusa (town)
THELPOUSA (Thelpusa) was the Naiad-nymph of the spring, well or fountain of the town of Thelpousa in Arkadia (southern Greece). She was the daughter of the local river-god Ladon.
LADON (Pausanias 8.25.2)
TELPHU′SA (Telphoussa or Telphousa). 1. A daughter of Ladon, a nymph from whom the town of Telphusa in Arcadia derived its name. (Steph. Byz. s. v.) 2. Telphussaea or Tilphussaea occurs as a surname of Demeter Erinnys, derived from a town Telphussion. (Schol. ad Soph. Antig. 117; Callim. Fragm. 207, ed. Bentley.)
Source: Dictionary of Greek and Roman Biography and Mythology.
CLASSICAL LITERATURE QUOTES
Pausanias, Description of Greece 8. 25. 2 (trans. Jones) (Greek travelogue C2nd A.D.) :
"[The town of Thelpousa (Thelpusa) in Arkadia] was named after Thelpousa, a Nymphe, and that she was a daughter of Ladon."
- Pausanias, Description of Greece - Greek Travelogue C2nd A.D.