Callisto. Seduced by Zeus as Diana.
   In Greek mythology, Callisto or Kallisto was a nymph, or the daughter of King Lycaon; the myth varies in such details. She was one of the followers of Artemis, or Diana for the Romans, who attracted Zeus.
   He transformed himself into the figure of Artemis and raped her in this disguise. She became pregnant and when this was eventually discovered, she was expelled from Artemis's group, after which a furious Hera transformed her into a bear.
   Later, just as she was about to be killed by her son when he was hunting, she was set among the stars as Ursa Major. She was the bear-mother of the Arcadians, through her son Arcas by Zeus.
   The fourth Galilean moon of Jupiter is named after Callisto. Genealogy Name Relation Lycaon Father Arcas Son/grand-uncle 50 sons of Lycaon Brothers Dia Sister Psophis Sister Pelasgus Grandfather Meliboea Grandmother Zeus Great-grandfather Niobe Great-grandmother Oceanus Great-grandfather Tethys Great-grandmother Apheidas Grandson Elatus Grandson Azan Grandson Hyperippe Granddaughter Triphylus Grandson Diomeneia Granddaughter Erymanthus Grandson As a follower of Artemis, Callisto, who Hesiod said was the daughter of Lycaon, king of Arcadia, took a vow to remain a virgin, as did all the nymphs of Artemis. But to have sex with her, Zeus disguised himself as Artemis herself, in order to lure her into his embrace. Callisto was then turn
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