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Cognomen Ohno (オオノ , Ohno , オーノ ) , in the entire world, is quite a rare surname. The cognomen Ohno is characteristic of Estonia, where it is quite a rare surname, Japan, where it is a rare surname, and Singapore. Measured by absolute frequency, the name is most common in Japan, the United States, and Brazil. Much more frequently, Ohno is the forename as well as the last name.