Peiros or Peirous (Ancient Greek: Πείρος / Πείροος) is the Thracian war-leader from Aenus, son of Imbrasus, who allies with Priam. In Iliad 4 he slays Diores with a jagged stone and is himself killed by Thoas of Aetolia. The atlas keeps a separate Catalogue node (peirous-thracian); Wikipedia unifies the Homeric spellings on one page.
Adapted from Wikipedia, "Peirous" · CC BY-SA 4.0
I.Thracian captain
Homer places Peiros son of Imbrasus among the Thracians from Aenus. He smites Amarynceus' son Diores on the ankle with a jagged stone, crushing sinew and bone; Thoas of Aetolia then drives a spear through Peiros' breast beside the nipple.
Later notices make him father of Rhygmus, who also fights at Troy. He is not the Achaean river Peiros in the Peloponnese.
II.Homonyms and spelling
This atlas entry (peiros-thracian) is the battlefield son of Imbrasus. The Catalogue captain Peirous (peirous-thracian) is stored separately; many readers treat them as one Homeric figure under variant spellings.