Last name Петцу (Petcu 
, Петцу 
) , around the globe, is a common family name. The cognomen Петцу is habitual in Romania, where it is quite a common surname, Moldova, and Mauritania, where it is quite a rare surname. Measured by absolute frequency, it most frequently occurs in Romania, Moldova, and Afghanistan. Very seldom, Петцу is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Petcu | Romania, Italy, Spain, Moldova, Afghanistan |
| Петцу | Russia |