Cognomen 国一 (Guoyi 
, 国一 ) , in the entire world, is a rare family name. The family name 国一 is habitual in China, where it is a very rare surname, Spain, and Malaysia, where it is an extremely rare surname. In absolute terms, it is the most numerous in China, Spain, and the United States. Predominantly, 国一 is the forename as well as the last name.