Last name Clardia (Clardia 
) , around the world, is an extremely rare cognomen. The last name Clardia is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Much more frequently, Clardia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Clardia | United States, Brazil, Democratic Republic of the Congo, South Africa |