Around the globe, タダオ (Tadao 
, タダオ ) is a rare male first name. The first name タダオ is characteristic of Japan, where it is a rare male name, the United States, where it is a very rare male name, and Brazil. Measured by absolute frequency, the name is most common in Japan, China, and the United States. More frequently, タダオ is the last name as well as the forename.