Family name Osório (Osório 
) , all around the world, is quite a rare surname. The cognomen Osório is habitual in Cabo Verde, where it is quite a common surname, Portugal, and Angola, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Portugal, Angola, and Brazil. Much less frequently, Osório is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Osório | Portugal, Brazil, Angola, Mozambique, Cabo Verde |
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jerónimo osório Portuguese historian, PT (b. 1506) |
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| juan osório born 1542; died 1594 (b. 1542) |
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| bernardo antónio de mello osório Roman Catholic bishop (1688-1771) (b. 1688) |
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manuel luís osório Brazilian military officer, BR (b. 1808) |
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josé frutuoso aires de gouveia osório PT (b. 1827) |
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fernando luís osório Brazilian journalist and lawyer (1848-1896), BR (b. 1848) |
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| josé francisco de miranda osório Brazilian politician, BR (b. 1800) |
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manuel pinto osório Portuguese engineer and politician, PT (b. 1870) |
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ana de castro osório Portuguese suffragist, editor, PT (b. 1872) |
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| antónio de gouveia osório politician, PT (b. 1825) |
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| josé basson de miranda osório Brazilian politician, BR (b. 1836) |
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antónio de sousa horta sarmento osório PT (b. 1882) |
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| manoel luís da rocha osório Brazilian politician, BR (b. 1844) |
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| josé francisco de carvalho sanches osório PT (b. 1866) |
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| augusto da silva carvalho osório (b. 1878) |
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