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Family name Oller (Oller
, Олер
, Оллер
) , in all the world, is quite a common last name. The cognomen Oller is habitual in Panama, where it is quite a rare surname, Spain, and the Dominican Republic. Measured by absolute frequency, it is the most numerous in the United States, Spain, and Philippines. Much less frequently, Oller is the forename as well as the last name.