Cognomen Lourdon (Lourdon 
) , throughout the world, is a very rare family name. The last name Lourdon is characteristic of Belgium, where it is a rare surname, France, where it is an extremely rare surname, and Spain. Not in comparison with a country's population, it is commonest in Belgium, the United States, and France. Very seldom, Lourdon is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lourdon | Belgium, South Africa, Spain, United States, France |