Throughout the world, Mastromatteo (Mastromatteo 
) is a very rare gender-neutral first name. The first name Mastromatteo is habitual in Southern Europe, particularly Italy, where it is a very rare gender-neutral name. Predominantly, Mastromatteo is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Mastromatteo | Italy, Australia, United States, Argentina, Canada |
Mastromattéo, and Мастроматтео