Last name Fahrni (Fahrni 
, Фарні 
) , in the world, is quite a rare family name. The surname Fahrni is habitual in Switzerland, where it is quite a common surname, the United States, where it is a very rare surname, and Germany. Very seldom, Fahrni is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Fahrni | Germany, Switzerland, United States, Canada, France |
| Фарні | Ukraine |
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hans fahrni Swiss chess player (1874-1939), CH (b. 1874) |
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| otto fahrni Swiss landscape artist, born 15 September 1856, died 1887, CH (b. 1856) |
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| gordon s. fahrni Canadian physician (1887-1995), CA (b. 1887) |
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| mildred fahrni Canadian activist, CA (b. 1900) |
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| helene fahrni (1901-1985), CH (b. 1901) |
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| fritz fahrni Swiss business executive, CH (b. 1942) |
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| dieter fahrni (b. 1951) |
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| guillaume fahrni researcher |
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| mathumalar loganathan fahrni researcher |
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| stella fahrni researcher |
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| ilona fahrni Swiss artistic swimmer |
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| christoph j fahrni researcher |
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| rené fahrni CH (b. 1977) |
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| maya fahrni |
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| peter fahrni |
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