Danaides

n. (Greek Mythology) the general name for the 50 daughters of Danaus

For the butterfly genus, see Danaus (genus). Danaus, or Danaos ("sleeper") was a Greek mythological character, twin brother of Aegyptus son of Achiroe and Belus, a mythical king of Egypt. The myth of Danaus is a foundation legend (or re-foundation legend) of Argos, one of the foremost Mycenaean cities of the Peloponnesus. In Homer's Iliad, "Danaans" ("tribe of Danaus") and "Argives" commonly designate the Greek forces opposed to the Trojans.
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n. Danaides, the general name for the 50 daughters of Danaus (Greek Mythology)

[Greek] The fifty daughters of Danaus. He fled with his daughters in fear of his twin brother Aegyptus, but the fifty sons of Aegyptos followed them to Argos and forced Danaus to give them his daughters in marriage. At their father's behest they murdered their husbands at their wedding night. The only one who spared her husband was Hypermnestra. In Hades, the girls were condemned eternally to pour water in a vessel with holes in its bottom.