In Greek mythology, Sthenele (Ancient Greek Σθενέλη) was a princess of Iolcus, daughter of King Acastus. In Apollodorus' account of Achilles' companions she is mother of Patroclus by Menoetius of Opus — one of several named mothers for the hero who later dies in Achilles' armour at Troy.
Adapted from Wikipedia, "Sthenele" · CC BY-SA 4.0
I.Mother of Patroclus
Apollodorus (Bibliotheca 3.13.8) lists Sthenele daughter of Acastus among the women said to have borne Patroclus to Menoetius. The same passage records rival mothers — Periopis daughter of Pheres, or Polymele daughter of Peleus according to Philocrates — so her maternity is a disputed fork, not a universal fact.
Scholia on Apollonius and Homer preserve the Acastid strand. After the dice-quarrel at Opus in which Patroclus killed a playmate, he was reared in Peleus' house beside Achilles — the companionship that defines the Iliad.
II.Homonyms
This node (sthenele-acastus) is Acastus' daughter only. She is not Sthenele the Danaid who married and killed Sthenelus son of Aegyptus (sthenele-danaid).