Family name Caillier (Caillier 
) , around the world, is quite a rare last name. The surname Caillier is characteristic of France, where it is a rare surname, Switzerland, and Canada. Measured by absolute frequency, this name is the most popular in France, the United States, and Canada.
| VARIANT | COUNTRY |
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| Caillier | Canada, Switzerland, France, New Zealand, United States |
| rené caillier French politician (1879-1946), FR (b. 1879) |
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| thierry caillier French wheelchair tennis player, FR (b. 1961) |
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| michel caillier professor of agricultural sciences at Laval University, CA |
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| stacy j. caillier |
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