Family name Herlo (Herlo 
) , across the world, is a rare last name. The surname Herlo is characteristic of Romania, where it is quite a rare surname, Nicaragua, where it is a rare surname, and Hungary, where it is a very rare surname. Measured by absolute frequency, the name is most common in Romania, the United States, and Germany. Likewise, Herlo is the forename as well as the last name.