Sthenelos

… On the day that Zeus was to give birth to Alkmēnē, wife of Amphitryon (both were grandchildren of the hero Perseus), in Thebes, Zeus told his wife Hera that the descendant of Perseus, born that day, would become the ruler of Argos. When Hera, who had always been keeping a close eye on her husband's conduct, heard this, she ordered Eileithyia, the goddess of childbirth, to delay the birth of Heracles, while Eurystheus, the son of Sthenelos, King of Argos and Alcmene's cousin, was born first. She also tried to kill the infant Heracles by putting two snakes into his cradle, but the future hero easily strangled them. …

*Some of the terminology explanations that mention "Sthenelos" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…　ゼウスがアンフィトリュオンAmphitryōnの妻アルクメネAlkmēnē(二人とも英雄ペルセウスの孫)に生ませた子で，彼がテーバイの地で生まれようとした日，ゼウスは妃ヘラに，今日生まれるペルセウスの後裔はアルゴスの支配者となろうと語った。つねづね夫の素行に目を光らせていたヘラはこれを聞くと，お産の女神エイレイテュイアEileithyiaに命じてヘラクレスの誕生を遅れさせる一方，アルクメネの従兄にあたるアルゴス王ステネロスSthenelosの子エウリュステウスEurystheusを先に生まれさせた。彼女はさらに赤児のヘラクレスを殺そうとその揺りかごに2匹の蛇をはいこませたが，将来の英雄はなんなくそれを締め殺した。…

※「Sthenelos」について言及している用語解説の一部を掲載しています。

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