Last name Baielli (Baielli 
) , all around the world, is a very rare cognomen. The family name Baielli is habitual in Italy, where it is a rare surname, Argentina, where it is an extremely rare surname, and the United States. Much less frequently, Baielli is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Baielli | United States, Italy, Argentina |