Family name Деню (Деню 
, Denyu 
, Denju 
) , all around the world, is quite a rare last name. The last name Деню is habitual in Bulgaria, where it is quite a rare surname, Japan, and Romania, where it is a rare surname. Also, Деню is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Деню | Bulgaria, Ukraine |
| Denyu | Brazil, Bulgaria, India, United States, Japan |
| Denju | Brazil, India, United States, Nigeria, Japan |
| Deniu | Brazil, Romania, United States |