Last name Casaban (Casaban 
) , across the world, is a rare surname. The surname Casaban is habitual in Spain, where it is a rare surname, France, and Chile, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Spain, France, and Argentina. Also, Casaban is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Casaban | Philippines, France, Argentina, Spain, United States |