InGreek mythology,Megisto (Ancient Greek:Μεγιστώ,romanized: Megistṓ,lit. 'the greatest') is, in some accounts, another form forCallisto,[1] the mother ofArcas byZeus.[2] She was also calledThemisto, daughter ofInachus.[3]
Megisto was of royal blood due to her father beingCeteus, son of KingLycaon ofArcadia.[2]
Like Callisto, Megisto suffered the same fate like hers in which she was transformed as well into a bear. Her father, Ceteus, is represented in the sky as the Kneeler as he seems to be kneeling on one knee, lamenting her daughter's fate and holding up outstretched hands to heaven, asking for the gods to restore her to him.[2]