Family name Costas-Holly (Costas-Holly 
) , in the world, is an extremely rare last name. The family name Costas-Holly is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Costas, and a first name Holly.
| VARIANT | COUNTRY |
|---|---|
| Costas-Holly | United States |