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 | Ukraine, Bulgaria |
| Denyu | Japan, United States, Bulgaria, India, Brazil |
| Denju | Japan, Nigeria, United States, India, Brazil |
| Deniu | Romania, Brazil, United States |