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Family name Lutra (Lutra
, Lutro
, Lontra
) , in all the world, is quite a rare last name. The cognomen Lutra is habitual in Norway, where it is quite a rare surname, Brazil, where it is a rare surname, and Greece, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Brazil, Norway, and Indonesia. Much less frequently, Lutra is the forename as well as the last name.