Surname Demontigny (Demontigny 
) , around the world, is quite a rare family name. The surname Demontigny is characteristic of Canada, where it is quite a rare surname, New Zealand, where it is a rare surname, and France. In absolute terms, it is the most numerous in Canada, the United States, and France.
| VARIANT | COUNTRY |
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| Demontigny | Canada, France, New Zealand, United States, Indonesia |
| robert demontigny Canadian television presenter, CA (b. 1939) |
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| angela demontigny native Canadian fashion designer, CA |
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| auriane demontigny researcher (ORCID 0000-0003-0429-6374) |
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| gabriel demontigny particle physicist in Canada |
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