Cognomen Firmo (Firmo 
, Fermen 
, Firmare) , throughout the world, is quite a common last name. The last name Firmo is habitual in Portugal, where it is quite a rare surname, Brazil, and Angola. In absolute terms, this name is the most popular in Brazil, Portugal, and Italy. Very seldom, Firmo is the forename as well as the last name.
| firmo josé de mattos BR (b. 1824) |
|
|
| firmo freire do nascimento Brazilian military personnel, BR (b. 1881) |
|
|
| manuel firmo PT (b. 1909) |
|
|
| firmo ferrer i casadevall chronicler of Cadaqués, ES (b. 1921) |
|
|
| walter firmo Brazilian photographer, BR (b. 1937) |
|
|
| firmo roberti Argentine sport shooter, AR (b. 1943) |
|
|
| firmo fernandes de castro Brazilian politician, BR (b. 1944) |
|
|
| firmo camurça Brazilian politician, BR (b. 1964) |
|
|
| gianluca firmo musical artist, IT (b. 1973) |
|
|
| firmo sousa campos researcher (ORCID 0000-0003-1783-6632) |
|
|
| josélia oliveira araújo firmo researcher (ORCID 0000-0001-5330-476X) |
|
|
| josélia oliveira araújo firmo researcher (ORCID 0000-0002-3264-9627) |
|
|
| sebastião marques antunes firmo D.Sc. Pontifícia Universidade Católica do Rio de Janeiro 1984 |
|
|
| ottorino firmo Italian association football player, IT |
|
|
| firmo de tipasa |
|