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Cognomen Duno (Duno
, Дуно
) , in all the world, is quite a rare surname. The cognomen Duno is characteristic of Bosnia and Herzegovina, where it is quite a common surname, Venezuela, and Uruguay, where it is a rare surname. Not in comparison with a country's population, it is commonest in Venezuela, Philippines, and Bosnia and Herzegovina. Very seldom, Duno is the forename as well as the last name.