Family name Dieaconu (Dieaconu 
) , in all the world, is a rare cognomen. The cognomen Dieaconu is habitual in Romania, where it is a rare surname, Italy, where it is a very rare surname, and Germany, where it is an extremely rare surname. Much less frequently, Dieaconu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dieaconu | Romania, Italy, United Kingdom, Germany |