 Amalthea is named after the nymph Amalthea from Greek mythology , who nursed the infant Zeus ( the Greek equivalent of Jupiter ) with goat 's milk . Its Roman numeral designation is Jupiter V. The name " Amalthea " was not formally adopted by the IAU until 1976 , although it had been in informal use for many decades . The name was initially suggested by Camille Flammarion . Before 1976 , Amalthea was most commonly known simply as Jupiter V. The adjectival form of the name is <unk> . 
