Around the world, بييرو (Piero 
, Pierrot 
, Pieru 
) is a widespread masculine first name. The given name بييرو is habitual in Italy, where it is a common male name, San Marino, where it is a common epicene name, and Peru, where it is quite a rare boy's name. Measured by absolute frequency, it is the most numerous in Italy, Peru, and France. Much less frequently, بييرو is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Piero | United States, France, Indonesia, Italy, Peru |
| Pierrot | France, Indonesia, Democratic Republic of the Congo, Italy, Peru |
| Pieru | India, Finland, Brazil |
Kepa, Peder, Pedro, Pedru, Peer, Peeter, Peetu, Pehr, Per, Pere, Pero, Peru, Petar, Petelo, Peter, Peters, Petko, Petr, Petras, Petri, Petro, Petros, Petru, Petrus, Petter, Petteri, Petur, Petyr, Piatro, Pierre, Piet, Pietari, Pieter, Pietro, Piotr, Piters, Pjeter, Pjetur, Pjetër, Pjotr, Pyotr, Péter, Pétur, Pēteris, Πέτρος, Πέτρου, Πετρος, П'Ер, П'Єр, П'Єро,
بييرو is also a name for the fictitious and mythical characters: Pierrot , the stock character of pantomime and Commedia dell'Arte, The Golden Key, or the Adventures of Buratino; Pierrot , the puppet created by Richard Morin, The Star Keeper; Piero , the operatic character in the opera Pia de’ Tolomei, Pia de' Tolomei; Pierrot Van den Bossche , character in Familie and Pierrot , the musical character in the musical I'll Say She Is by Tom Johnstone, among other works.