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Last name Ōs (Oscar , Ōs , Ós) , in the world, is a widespread surname. The last name Ōs is characteristic of Latin America and the Caribbean, particularly Honduras, where it is a widespread surname, Nicaragua, where it is a common surname, and Mexico (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in Mexico, Spain, and Honduras. More prevalently, Ōs is the forename as well as the last name.