Cognomen Клам (Klam 
, Clam 
, Клам 
) , all over the world, is quite a rare surname. The family name Клам is characteristic of Mauritius, where it is quite a rare surname, Oman, and Hungary. In absolute terms, it is commonest in India, Philippines, and France. Much less frequently, Клам is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Klam | Germany, France, Philippines, Saudi Arabia, India |
| Clam | Democratic Republic of the Congo, France, United States, Philippines, India |
| Клам | Ukraine, Russia, Kazakhstan |