In the entire world, Isaul (Isaul 
) is quite a rare boy's forename. The first name Isaul is characteristic of Latin America and the Caribbean, particularly Peru, where it is quite a rare masculine name, Mexico, and Nicaragua, where it is a rare masculine name. Measured by absolute frequency, it is the most numerous in Latin America and the Caribbean, particularly Mexico, Peru, and Brazil. Likewise, Isaul is the last name as well as the forename.