Last name Martell-Gravie (Martell-Gravie 
) , in all the world, is an extremely rare cognomen. The last name Martell-Gravie 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 Martell, and a last name Gravie.
| VARIANT | COUNTRY |
|---|---|
| Martell-Gravie | United States |