Family name Birontas (Birontas 
) , in all the world, is a very rare cognomen. The family name Birontas is habitual in Northern Europe, particularly Lithuania, where it is a rare surname, and the United Kingdom, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Birontas | Lithuania, United Kingdom |
|
adolfas birontas LT (b. 1885) |
|