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Family name Loa (Loa , Lwa , לואה ) , all over the world, is a common surname. The cognomen Loa is habitual in Reunion, where it is quite a common surname, Fiji, where it is quite a rare surname, and Peru. In absolute terms, it is the most numerous in Mexico, Myanmar, and Indonesia. Likewise, Loa is the forename as well as the last name.