Family name Gex (Gex 
) , worldwide, is quite a rare cognomen. The family name Gex is habitual in Switzerland, where it is quite a rare surname, France, where it is a rare surname, and Indonesia. Also, Gex is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Gex | Switzerland, Indonesia, Egypt, United States, France |
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john peter de gex British lawyer (b. 1809) |
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amélie gex poet, writer (1835-1883), FR (b. 1835) |
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| jane gex (1832-1916) (b. 1832) |
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| françois gex French priest, historian and geographer (1881-1932), FR (b. 1881) |
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corrado gex Italian politician, IT (b. 1932) |
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| lucien m. gex American politician, US (b. 1907) |
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| maurice gex Swiss scholar, CH (b. 1930) |
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| christian gex French politician, FR (b. 1956) |
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| isabelle gex FR (b. 1963) |
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| amédée ii de gex lord of Gex |
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| alexander de gex Peerage person ID=401781 |
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| mathieu gex (b. 1977) |
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