Surname Gannas (Gannas 
) , all over the world, is a rare last name. The last name Gannas is habitual in Bahrain, where it is a rare surname, Libya, and Tunisia. Measured by absolute frequency, it is the most numerous in Saudi Arabia, Tunisia, and Libya. Very seldom, Gannas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gannas | Saudi Arabia, Tunisia, Libya, Tanzania, Poland |