In Greek mythology, Mermerus is one of the two sons of Jason and Medea at Corinth — usually paired with Pheres — who die in the Medea saga. Sources disagree whether the Corinthians stone them for the poisoned gifts to Glauce or Medea herself kills the children as she flees; a rarer Naupactian strand has Mermerus slain by a lioness while hunting. Distinct from Homeric Mermeri at Troy or Ephyre.
Adapted from Wikipedia, "Mermerus and Pheres" · CC BY-SA 4.0
I.Sons of Jason and Medea
After the Argonautica, Jason and Medea settle at Corinth and have sons. Euripides' Medea makes the mother murder her children to wound Jason; Apollodorus cites both that tradition and the Corinthian one in which the citizens stone the boys because of Medea's deadly gifts to Creon's daughter Glauce (Creusa).
Pausanias shows a tomb of Medea's children above the Fountain of Glauce and records local rites. Hyginus and Diodorus also preserve the filicide strand.
II.Other deaths and homonyms
A Naupactian poem, cited by Pausanias, has Mermerus killed by a lioness while hunting — a death outside Corinth's civic revenge. Homer knows other men named Mermerus (a Trojan victim; a father of Ilus at Ephyre) who must not be merged with Medea's child.
The atlas id mermerus-corinth is the Corinthian son of Jason and Medea.