EUBOIA (Euboea) or KHALKIS (Chalcis) was the Naiad Nymph of a fresh-water spring, well or fountain of Khalkis, the main town of the island of Euboia (central Greece). She was a daughter of the Boiotian river-god Asopos whom Poseidon abducted to the island.
Either the island of Euboia, or its chief settlement Khalkis were named after her.
CHALCIS (Chalkis), one of the daughters of Asopus and Metope, from whom the town of Chalcis in Euboea was said to have derived its name. (Eustath. ad Hom. p. 279.) According to others, Chalcis was the mother of the Curetes and Corybantes, the former of whom were among the earliest inhabitants of Chalcis. (Schol. Vict. ad Hom. Il. xiv. 291; Strab. x. p. 447.)
EUBOEA (Euboia), a daughter of Asopus, from whom the island of Euboea was believed to have derived its name. (Eustath. ad Hom. p. 278.)
Source: Dictionary of Greek and Roman Biography and Mythology.
Corinna, Fragment 654 (trans. Campbell, Vol. Greek Lyric IV) (C5th B.C.) :
"Of these nine daughters [of Asopos] . . . while Korkyra (Corcyra) and Salamis and lovely Euboia (Euboea) were stolen by father Poseidon."
Strabo, Geography 10. 1. 3 (trans. Jones) (Greek geographer C1st B.C. to C1st A.D.) :
"They derive [the name of the island ] Euboia (Euboea) from a heroine."
Diodorus Siculus, Library of History 4. 72. 1 (trans. Oldfather) (Greek historian C1st B.C.) :
"Asopos made his home in Phlios [in Sikyonia], where he married Metope, the daughter of Ladon, to whom were born two sons, Pelasgos and Ismenos, and twelve daughters, Korkyra and Salamis, also Aigina, Peirene, and Kleone, then Thebe, Tanagra, Thespeia, and Asopis, also Sinope, and finally Ornia and Khalkis (Chalcis)."
Nonnus, Dionysiaca 42. 411 ff (trans. Rouse) (Greek epic C5th A.D.) :
"Euboia (Euboea) the maiden he [Poseidon who loved her] rooted in the sea."
- Greek Lyric IV Corinna, Fragments - Greek Lyric C5th BC
- Strabo, Geography - Greek Geography C1st BC - C1st AD
- Diodorus Siculus, The Library of History - Greek History C1st BC
- Nonnos, Dionysiaca - Greek Epic C5th AD
Other references not currently quoted here: Eustathius on Homer's Iliad 278; Hesychius Euboia; Athenaeus 7.48; Claudian Epithalamium 10.158