Erato was one of the daughters of Thespius, King of Thespiae, Boeotia. She was one of the forty-nine of his fifty daughters to sleep with Heracles while he was in Thespia. She would bare him Dynastes.
Spouse & Lovers
Herakles (lover for one night)
by Erato he [Herakles] had Dynastes - Apollod. Bibliotheca 2.7.8