Female first name (Italian): Gaia, Latin (Roman first name), information on the male form Caio:; from a very old, then frequent Roman name 'Gaius' and 'Caius'; known by Gaius Julius Caesar Female first name (English): Gaia, Greek (Greek mythology), ge = the earth in Greek mythology Gaia was the goddess of the earth and mother of several gods Female first name (Greek): Gaia, ge = the earth in Greek mythology Gaia was the goddess of earth and mother of several gods