Surname Castanier (Castanier 
) , all over the world, is quite a rare cognomen. The last name Castanier is characteristic of France, where it is quite a rare surname, New Zealand, where it is a rare surname, and Belgium. In absolute terms, the name is most common in France, the United States, and Canada. Very seldom, Castanier is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Castanier | Belgium, Mexico, United States, Canada, France |
| justin castanier (b. 1855) |
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| prosper castanier (b. 1865) |
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paul castanier French pianist, FR (b. 1935) |
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| jean-baptiste castanier FR (b. 1877) |
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| bernard castanier French politician, FR (b. 1954) |
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| michel castanier French politician, FR (b. 1958) |
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| claudine castanier (b. 1952) |
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| jean-claude castanier French politician, FR (b. 1966) |
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| angelo castanier FR (b. 1967) |
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| léopold castanier French engineer |
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| jacques castanier priest |
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