Surname Nerro (Nerro 
) , in all the world, is a rare last name. The cognomen Nerro is habitual in Estonia, where it is a rare surname, Indonesia, where it is a very rare surname, and Philippines, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in Indonesia, the United States, and Nigeria. Also, Nerro is the forename as well as the last name.