Last name Ontañón (Ontañón 
) , across the world, is a very rare family name. The cognomen Ontañón is habitual in Spain, where it is a very rare surname, and Mexico, where it is an extremely rare surname.
| jacinto ontañón Spanish journalist, ES (b. 1844) |
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francisco ontañón Spanish photographer, ES (b. 1930) |
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| manuel ontañón ES (b. 1891) |
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| santiago ontañón Spanish production-designer, ES (b. 1903) |
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| eduardo de ontañón Spanish journalist and writer (1904-1949), ES (b. 1904) |
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| sara ontañón Spanish film editor (b. 1907) |
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| maría juana ontañón Spanish architect, ES (b. 1920) |
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| felipe de abajo ontañón ES (b. 1925) |
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| maria isabel ontañón y garcía del moral (born 1951) (b. 1951) |
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| ana leal ontañón (born 1973) (b. 1973) |
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| juan leal ontañón (born 1976) (b. 1976) |
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| santiago ontañón Ph.D. Universidad Autónoma de Barcelona 2005 |
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| roberto ontañón researcher (ORCID 0000-0002-0504-3961) |
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| i ontañón researcher |
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| santiago ontañón castillo ES |
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