Nicomachus (; fl. c. 375 BC) was the father of Aristotle. The Suda states that he was a doctor descended from Nicomachus, son of Machaon, son of Asclepius, the god of Medicine. He likely trained Aristotle in dissection and empirical observation, which was traditional for members of Asclepiadae. Greenhill notes he had another son named Arimnestus and a daughter named Arimneste by his wife Phaestis, or Phaestias, who was descended from Asclepius as well.
He was a native of Stageira and the friend and physician of Amyntas III, king of Macedonia, (393âÂÂ369/370 BC). Nicomachus, then Phaestis, died in the following years after Amyntas' death, so Aristotle came under the care of Proxenus of Atarneus, Arimneste's husband, between the ages of 10 and 13. Nicomachean Ethics, Aristotle's work on ethics, may have been dedicated to his father or edited by Aristotle's son, who was also named Nicomachus, likely after his grandfather.