In Greek mythology, Ismenis (Ancient Greek: Ἰσμηνίς) was a naiad nymph, one of the daughters of the Boeotian river god Ismenus:Statius, Thebaid 9.319 Ismenis is a patronymic rather than a given name.
Family Given her parentage, Ismenis was probably the sister to other naiads: Dirce,Euripides, Heracles 784; Callimachus, Hymn to Delos 76; Nonnus, 44.10 StrophiaCallimachus, Hymn to Delos 76 and Crocale.Ovid, Metamorphoses 3.169 The younger Linus, the music teacher of Heracles, was possibly a brother of hers.Pausanias, 9.29.9
In Statius' Thebaid, Ismenis was the mother, by Pan, of Crenaeus, a defender of Thebes in the war of the Seven against Thebes.
Mythology When Crenaeus was killed by Hippomedon whom he had challenged to single combat, Ismenis searched for his body which was carried away by the flow of River Ismenus, and, upon finding it, lamented her son's fate.Statius, Thebaid 9.318-403
Note
References Publius Papinius Statius, The Thebaid translated by John Henry Mozley. Loeb Classical Library Volumes. Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1928. Online version at the Topos Text Project. Publius Papinius Statius, The Thebaid. Vol I-II. John Henry Mozley. London: William Heinemann; New York: G.P. Putnam's Sons. 1928. Latin text available at the Perseus Digital Library.