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Family name Lavia (Lavia ) , in the entire world, is quite a rare last name. The surname Lavia is characteristic of Latin America and the Caribbean, particularly Saint Vincent and the Grenadines, where it is a common surname, Barbados, where it is quite a common surname, and Trinidad and Tobago, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Argentina, Italy, and Indonesia. Much less frequently, Lavia is the forename as well as the last name.