Surname Fernez (Fernez 
) , throughout the world, is a rare family name. The surname Fernez is habitual in France, where it is quite a rare surname, Belgium, where it is a rare surname, and Argentina, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in France, the United States, and Argentina. Likewise, Fernez is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Fernez | Belgium, Democratic Republic of the Congo, Argentina, United States, France |
| maurice fernez French inventor and pioneer in underwater breathing apparatus, FR (b. 1885) |
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| louis fernez French painter (1900-1984), FR (b. 1900) |
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| andré fernez Belgian editor-in-chief, BE (b. 1917) |
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