Cognomen Bontomase (Bontomase 
) , all around the world, is a very rare surname. The last name Bontomase is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Much less frequently, Bontomase is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bontomase | United States |