In the entire world, Cadia (Cadia 
) is a rare feminine forename. The first name Cadia is habitual in the Democratic Republic of the Congo, where it is a rare girly name, Italy, and Australia, where it is a very rare girly name. Measured by absolute frequency, this name is the most popular in the Democratic Republic of the Congo, Italy, and Philippines. Also, Cadia is the last name as well as the forename.