Last name Fontanet (Fontanet 
) , globally, is quite a rare family name. The last name Fontanet is habitual in Puerto Rico, where it is quite a rare surname, Switzerland, and Spain. Not in comparison with a country's population, it is the most numerous in Spain, France, and Argentina. Likewise, Fontanet is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Fontanet | Spain, Argentina, Switzerland, France, Cuba |
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pedro mata fontanet Spanish medical doctor, politician and writer, ES (b. 1811) |
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| francisco lacoma y fontanet Spanish painter (1784-1849), ES (b. 1784) |
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| agustí serra i fontanet Spanish trade unionist, ES (b. 1841) |
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jean-claude fontanet Swiss writer (1925-2009), CH (b. 1925) |
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guy fontanet Swiss lawyer and politician (1927-2014), CH (b. 1927) |
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| noël fontanet Swiss draughtsperson and painter (1898-1982), CH (b. 1898) |
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| josé fontanet Spanish water polo player (1900-1941), ES (b. 1900) |
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arnaud fontanet researcher, FR (b. 1961) |
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nathalie fontanet Swiss jurist and politician, CH (b. 1965) |
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| joseph fontanet French politician (1921-1980), FR (b. 1921) |
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patricio santos fontanet Argentinian singer, AR (b. 1979) |
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| rafael gomà i fontanet Spanish archaeologist and cultural activist, ES (b. 1935) |
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| xavier fontanet French businessperson and president and chief executive officer, FR (b. 1948) |
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| joseph fontanet French sport fisher, FR (b. 1953) |
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| joan fontanet mateu ES (b. 1944) |
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