Family name Deforrest (Deforrest 
) , all over the world, is a rare last name. The cognomen Deforrest is habitual in Northern America, particularly the United States, where it is a rare surname, and Canada, where it is a very rare surname. Very seldom, Deforrest is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Deforrest | Canada, United States |