1. IO www.art-and-archaeology.com/roman/pom38.html
Io Received by Isis At Canopus
Pompeii, Temple of Isis, 1st century BC
Io was a lover of Zeus, who changed her into a heifer to protect her from the anger of his wife Hera. In the later Roman cult, Io was identified with the Egyptian goddess Isis.
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3. Jupiter and Leda: Henri Matisse
According to myth, Leda was approached by the god Zeus while he was masquerading as a swan. Indeed, Zeus made love to Leda in this form. And the memorable union between Leda and the Swan (who, remember, was actually Zeus) has long been immortalized by painters and poets. In addition to influencing artists, however, this coupling also influenced mythology. Here is another poetic plot twist - the legend is that Helen was born from an egg because her father Zeus appeared as a swan when he impregnated Leda (it should be mentioned that some versions of the tale instead claim that it was the goddess Nemesis who laid the egg from which Helen hatched). Additionally, some ancient sources state that Polydeuces was also the son of Zeus, while his twin brother Castor was Tyndareus's child.

4. EUROPA www.art-and-archaeology.com/roman/pom23.html
daughter of Agenor and Telephassa. Zeus, enamored of her, appeared as a white bull, enticed her to climb on his back, and swam off with her to Crete. There she bore him Minos, Rhadamanthus, and Sarpedon. She married the king of Crete, who adopted her sons. After her death she was worshiped as a goddess in the festival of the Hellotia.