Surname Герро (Gerro 
, Герро 
) , in the entire world, is a rare last name. The family name Герро is habitual in Syria, where it is a rare surname, New Zealand, and Canada, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Syria, the United States, and Canada. Also, Герро is the forename as well as the last name.