1) King of Tiryns 
In Greek mythology, Eurystheus (s; Εὐρυσθεύς meaning `broad strength` in folk etymology and pronounced eu̯rystʰěu̯s) was king of Tiryns, one of three Mycenaean strongholds in the Argolid, although other authors including Homer and Euripides cast him as ruler of Argos: Sthenelus was his father and the `victorious horsewoman` Nicip...
(from the article `Heracles`) ...Amphitryon), granddaughter of Perseus. Zeus swore that the next son born of the Perseid house should become ruler of Greece, but by a trick of ...
King of Argos; imposed twelve labors on Hercules.
a king of Mycenae and cousin of Hercules, upon whom he imposed 12 labors. Cf. labors of Hercules.