In Greek mythology, Aristomachus (Ancient Greek Ἀριστόμαχος) is a name borne by several figures. The atlas node aristomachus-aeolid is the Biantid son of Talaus at Argos — brother of Adrastus in Apollodorus' stemma and, in one account, father of the Seven against Thebes champion Hippomedon — not the Heraclid Aristomachus who fell attempting to recover the Peloponnese.
Adapted from Wikipedia, "Aristomachus (mythology)" · CC BY-SA 4.0
I.Son of Talaus
Apollodorus names Aristomachus among the sons of Talaus in the Biantid house that held Argos with Adrastus. Later tradition makes him the father of Hippomedon, one of the Seven who marched on Thebes — a genealogical bridge from the Aeolid Bias line into the Theban wars.
Homonym guard: not Aristomachus the Heraclid (son of Cleodaeus, father of Temenus, Cresphontes, and Aristodemus), who misread an oracle and fell invading the Peloponnese under Tisamenus; not the suitor of Hippodamia slain by Oenomaus. The atlas id is the Argive Biantid alone.