Family name Coustas (Coustas 
) , all around the world, is a rare cognomen. The family name Coustas is characteristic of Marshall Islands, where it is a common surname, Australia, where it is a very rare surname, and Greece. Not in comparison with a country's population, it most frequently occurs in Marshall Islands, South Africa, and Australia.
| VARIANT | COUNTRY |
|---|---|
| Coustas | South Africa, Marshall Islands, Australia, Greece, France |
|
mary coustas Australian actress, AU (b. 1964) |
|