Surname Diat (Diat 
) , worldwide, is quite a rare last name. The surname Diat is habitual in France, where it is a rare surname, Malaysia, and Indonesia. Likewise, Diat is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Diat | Philippines, France, Malaysia, Indonesia, India |
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louis diat American chef, FR (b. 1885) |
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| jean diat French politician (1919-2002), FR (b. 1919) |
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| robert diat French politician, FR (b. 1955) |
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| nicolas diat French journalist and essayist, FR (b. 1975) |
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| olivier diat researcher ORCID ID = 0000-0003-3011-8168 (b. 1981) |
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