Ismenis

In Greek mythology, Ismenis (Ancient Greek: Ἰσμηνίς) was a naiad nymph, one of the daughters of the Boeotian river god Ismenus: Ismenis is a patronymic rather than a given name.

Family
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.