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Cognomen Гая (Gaya , Gaia , Gaja ) , around the world, is a common family name. The surname Гая is habitual in Mauritius, where it is quite a common surname, Moldova, where it is quite a rare surname, and Brazil. In absolute terms, it is commonest in India, Brazil, and Indonesia. More prevalently, Гая is the forename as well as the last name.