Unlike Asteropaeus, Homer does not provide a pedigree for Pyraechmes (although Dictys Cretensis says his father was Axius - also the name of a river in Paeonia). Pyraechmes was killed in battle by Patroclus: dressed in Achilles' armor, Patroclus routed the panicked Trojans, and the first person he killed was Pyraechmes.
Unlike Asteropaeus, Homer does not provide information about Pyraechmes' ancestry (although Dictys Cretensis claims his father was Axius - also a river in Paeonia).  Pyraechmes was slain by Patroclus while wearing Achilles' armor; Patroclus routed the panicked Trojans and killed him first.