Surname Geroncio (Geroncio 
) , all around the world, is a rare cognomen. The cognomen Geroncio is characteristic of Latin America and the Caribbean, particularly Honduras, where it is a rare surname, Brazil, and Nicaragua, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Brazil, Mexico, and Spain. More frequently, Geroncio is the forename as well as the last name.
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