To make the Greek mythology short, Zeus, who was the father of gods, fell in love with the god Asopo’s daughter (he had 20 daughters!), who was of course very beautiful and her name was Aegina. Zeus kidnapped her and took her to the island of Oinoi. There, they had a son called Aiakos and the island was named after her. Aegina was also Achileas and Aiada’s hometown and they were both two of the most important heroes in the war of Troy. In historical terms, there is evidence that the island was inhabited from as early as 3500 B.C.
You can read my article about Aegina Island on the site of The Travel Belles here.