Wikipedia
Megaris
This is also the ancient Greek name of a small island off Naples, site of the Castel dell'Ovo.
Megaris was a small but populous state of ancient Greece, west of Attica and north of Corinthia, whose inhabitants were adventurous seafarers, credited with deceitful propensities. The capital, Megara, famous for white marble and fine clay, was the birthplace of Euclid. Mount Geraneia dominates the center of the region. The island of Salamis was originally under the control of Megara, before it was lost to Athens in the late 7th century BCE.