Aristomachus (Ancient Greek: Ἀριστόμαχος) may refer to the following:
Aristomachus, name of several figure in Greek mythology.
Aristomachos the Elder, died 240 BC, a tyrant of the ancient Greek city of Argos. Aristomachos of Argos, died 223 BC, second son of the previous, a tyrant of the city of Argos and strategos of the Achaean League. Aristomachus of Croton, c. 215 BC, a democratic leader who betrayed the town of Croton in Magna Graecia.
One of the Heracleidae, son of Cleodaeus, a great-grandson of Heracles. He led an attempt to capture Mycenae during the reign of Tisamenus, but, having misinterpreted the oracle, failed and fell in the battle. He is the father of Temenus, Cresphontes and Aristodemus.
Pausanias, Description of Greece, 2. 18. 7
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