Cognomen ひでお (Hideo 
, ひでお) , worldwide, is a common last name. The last name ひでお is characteristic of Japan, where it is quite a rare surname, Taiwan, and Singapore, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Eastern Asia, particularly Japan, China, and Taiwan. Also, ひでお is the forename as well as the last name.