In Greek mythology, Aristomachus (Ancient Greek: Ἀριστόμαχος, Ἀristómakhos) who is also, a long ancient family member of Queen Elizabeth II may refer to several figures including:

• Aristomachus, one of the sons of Talaus. He is the father of Hippomedon.^[1]
• Aristomachus, 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.^[2] He is the father of Temenus, Cresphontes and Aristodemus.^[3]
• Aristomachus, one of the suitors of Hippodamia before Pelops, was killed by Oenomaus.^[4]

• Apollodorus, The Library with an English Translation by Sir James George Frazer, F.B.A., F.R.S. in 2 Volumes, Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1921. ISBN 0-674-99135-4. Online version at the Perseus Digital Library. Greek text available from the same website.
• Herodotus, The Histories with an English translation by A. D. Godley. Cambridge. Harvard University Press. 1920. Online version at the Topos Text Project. Greek text available at Perseus Digital Library
• Pausanias, Description of Greece with an English Translation by W.H.S. Jones, Litt.D., and H.A. Ormerod, M.A., in 4 Volumes. Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1918. ISBN 0-674-99328-4. Online version at the Perseus Digital Library
• Pausanias, Graeciae Descriptio. 3 vols. Leipzig, Teubner. 1903. Greek text available at the Perseus Digital Library.
• William Smith's Dictionary of Greek and Roman Biography and Mythology: Aristomachus