Family name Teruo (Teruo 
, 照雄 , テルオ ) , across the world, is a common cognomen. The family name Teruo is characteristic of Japan, where it is quite a rare surname, Jordan, where it is a rare surname, and Taiwan. Not in comparison with a country's population, this name is the most popular in Eastern Asia, particularly Japan, China, and Taiwan. Very seldom, Teruo is the forename as well as the last name.