Cognomen Karru (Carro 
, Karru 
) , around the globe, is a common last name. The family name Karru is habitual in Uruguay, where it is quite a common surname, Argentina, and Spain, where it is quite a rare surname. Measured by absolute frequency, the name is most common in Argentina, Mexico, and Spain. Much less frequently, Karru is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Carro | Spain, Uruguay, Mexico, India, Argentina |
| Karru | Portugal, Finland, United States, India, Brazil |
| elton pinheiro karru person identified in the Museu da Pessoa collection, BR (b. 1963) |
|