Around the globe, サダオ (Sadao 
, サダオ ) is a rare primarily male, but very seldom feminine first name. The given name サダオ is habitual in Japan, where it is a rare boy's name, the United States, where it is a very rare primarily boy's, but scarcely feminine name, and Brazil, where it is a very rare male name. More prevalently, サダオ is the last name as well as the forename.