Cognomen Джанкарло (Giancarlo 
, Gian-Carlo 
, Джанкарло 
) , all over the world, is quite a common family name. The surname Джанкарло is characteristic of Cyprus, where it is quite a rare surname, Italy, and Peru. Measured by absolute frequency, the name is most common in Italy, Peru, and Mexico. Predominantly, Джанкарло is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Giancarlo | Italy, Guatemala, Peru, United States, Brazil |
| Gian-Carlo | Germany, Italy, Philippines, United States, France |
| Джанкарло | Ukraine, Russia |
Dzhankarlo, Gian Carlo, Giovanni Carlo, Jean-Charles, Juan Carlos, Juan-Carlos, Жан-Шарль, Хуан Карлос, and خوان كارلوس