Cognomen Нагао (Nagao 
, 永尾 , Нагао 
) , globally, is quite a rare last name. The cognomen Нагао is characteristic of Japan, where it is a rare surname, Brazil, and Hong Kong. Not in comparison with a country's population, it is the most numerous in Brazil, Japan, and the United States. Also, Нагао is the forename as well as the last name.