Last name Callwell (Callwell 
) , worldwide, is a very rare family name. The family name Callwell is characteristic of the United Kingdom, where it is an extremely rare surname, and the United States. Very seldom, Callwell is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Callwell | United Kingdom, United States |
| charles edward callwell Anglo-Irish officer of the British Army and author, GB (b. 1859) |
|