Endeis was the wife of King Aeacus of Aegina in Greek mythology, with whom she had two children, Telamon and Peleus. It is uncertain who her parents were; some source mention the Centaur Chiron and the nymph Chariclo; others say that she was the daughter of King Pandion of Athens; or of the warlord Sciron.
Endeis' husband had a son with the Nereid Psamanthe; his name was Phocus and his step mother hated him. So, she made a plan to kill him; plotting with her sons, it was decided that Telamon would be the one to murder his step-brother while participating at a pentathlon. During the games, Telamon "accidentally" threw the discus towards Phocus, hitting him in the head and killing him. Telamon and Peleus tried to hide the body, but they were discovered, and Aeacus banished them from the island.