Last name Caldarium (Caudron 
, Chaudron 
, Chowder 
) , in all the world, is quite a common surname. The family name Caldarium is characteristic of Belgium, where it is quite a common surname, France, where it is quite a rare surname, and Israel. Measured by absolute frequency, the name is most common in France, Belgium, and Ivory Coast. Much less frequently, Caldarium is the forename as well as the last name.