Family name Kéfer (Кефер 
, Kéfer) , across the world, is a rare cognomen. The family name Kéfer is habitual in Kazakhstan, where it is a rare surname, Belarus, and Ukraine, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Russia, Kazakhstan, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Кефер | Kazakhstan, Russia, Ukraine, Belarus |
| louis kéfer Belgian violinist and composer, BE (b. 1842) |
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| paul adolphe kéfer French-born American cellist, FR (b. 1875) |
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