Cognomen ديكارت (Descartes 
, ديكارت 
) , across the world, is quite a rare last name. The cognomen ديكارت is characteristic of Saint Lucia, where it is quite a common surname, Belgium, where it is a rare surname, and Cameroon. In absolute terms, it is the most numerous in France, Saint Lucia, and Cameroon. Also, ديكارت is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Descartes | Saint Lucia, France, Democratic Republic of the Congo, United States, Cameroon |
| ديكارت | Morocco |