Not to be confused with Herakles son Dynastes, Dynaste was the mother of Eratus by Herakles.
Eratus
"A son of Heracles by Dynaste, was king of Argos, and made a successful expedition against Asine, which was besieged and taken." (Apollod. ii. 7. § 8; Paus. ii. 36. § 5.)