Family name Estaún (Estaún 
) , around the world, is a very rare last name. The cognomen Estaún is characteristic of Southern Europe, particularly Spain, where it is a very rare surname.
| pascual lópez estaún Roman Catholic bishop (b. 1707) |
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| andrés pérez estaún Spanish geologist, ES (b. 1947) |
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| sergio del campo estaún Spanish politician, ES (b. 1981) |
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