Cognomen Калфов (Калфов 
) , globally, is a very rare surname. The cognomen Калфов is habitual in Eastern Europe, particularly Bulgaria, where it is quite a rare surname, and Ukraine, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Калфов | Ukraine, Bulgaria |
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христо калфов Bulgarian politician (1883-1945), BG (b. 1883) |
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дамян калфов Bulgarian writer, BG (b. 1887) |
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