Europa was the daughter of the Phoenician King and Queen, Aegnor and Telephassa. But one day, she was kidnapped by Zeus, who had taken the form of a white bull, and carried off to Crete. Here, Zeus seduced her (accounts differ as to whether he was still in the form of a bull at the time). Europa became the first Queen of Crete, and bore three sons: Minos (her heir), Sarpedon and Rhadamanthis.
So myth tells us. The truth of the matter may never be known, but from what we know of Minoan culture (named for Europa’s son), the bull was an important part of it, featuring in their religious and cultural ceremonies. The myth seems than an attempt to rationalise curious aspects of Cretan culture by mainland Greeks.
Europa’s three sons, in the myth, all became kings, Minos in Crete, Sarpedon in Lycia and Rhadamanthus in Boetia. Europa herself gave her name to the entire continent of Europe. Myth is with us, always.