Family name Carl-John (Carl-John 
) , in all the world, is an extremely rare last name. The family name Carl-John is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. More prevalently, Carl-John is the forename as well as the last name. Parts of the name also exists independently as a first name Carl, and a first name John.
| VARIANT | COUNTRY |
|---|---|
| Carl-John | Canada, South Africa, United States, Philippines |