Maia can mean several things:
Maia, in Greek mythology, is the eldest of the Pleiades, the seven daughters of Atlas and Pleione.
Maia was identified in Roman mythology with Maia Maiestas (also called Fauna, Bona Dea (the ‘Good Goddess’) and Ops), a goddess who may be equivalent to an old Italic goddess of spring.
In astronomy, Maia (20 Tauri) is the third brightest of the seven bright stars in the Pleiades open star cluster.
In J. R. R. Tolkien’s mythos, a Maia is one from the lesser kind of Ainur, beings of power which pre-date the creation of existence.