Surname Deneffe (Deneffe 
) , worldwide, is a rare cognomen. The last name Deneffe is habitual in Western Europe, particularly Belgium, where it is quite a rare surname, Germany, where it is a very rare surname, and France. Not in comparison with a country's population, the name is most common in Belgium, Germany, and the United States. Very seldom, Deneffe is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Deneffe | Belgium, Spain, France, Germany, United States |
| victor deneffe Belgian university professor and politician, BE (b. 1835) |
|
|
| august deneffe (b. 1875) |
|
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