Cognomen F. (F. 
, 弗朗西斯 , Ф. 
) , all around the world, is a common family name. The family name F. is habitual in Cyprus, where it is quite a common surname, Belgium, where it is quite a rare surname, and Taiwan. Measured by absolute frequency, it most frequently occurs in Indonesia, Taiwan, and Belgium. More frequently, F. is the forename as well as the last name.
| VARIANT | COUNTRY |
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| F. | Bangladesh, Taiwan, Indonesia, Sri Lanka, China |
| 弗朗西斯 | China |
| Ф. | Russia, Bulgaria, Belarus, Armenia, Ukraine |
| フレデリック | Japan |
| s. f. (1793-1855), SK (b. 1793) |
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| carlos flavio f. (b. 1861) |
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| sebastian j. f. Austrian film director (b. 1901) |
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anna f. Austrian singer-songwriter, AT (b. 1985) |
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| ángel cabrera f. Chilean association football player, CL (b. 1946) |
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| antonio polo f. (b. 1939) |
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| josé manuel de ferari f. (b. 1951) |
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| héctor franceschi f. Venezuelan university teacher, VE (b. 1962) |
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| josé blanco f. Dominican University professor, CR (b. 1965) |
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| nanang iskandar f. Indonesian politician (born 1966 in Tanjung Karang), ID (b. 1966) |
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| andrea polanco f. ichthyologist, CO |
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| andreas f. victim of far-right hate crime in Germany killed in 2007, DE |
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| e. f. Peerage person ID=422686 |
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| d.f. artist; active c. 1855 |
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| monogrammist a. m. f. British artist (active 1847) |
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