Surname 正雄 (正雄 
, Zhengxiong 
, Kotani 
) , all around the world, is quite a common cognomen. The last name 正雄 is habitual in Albania, where it is quite a rare surname, Japan, where it is a rare surname, and Singapore. Not in comparison with a country's population, the name is most common in China, India, and Japan. More prevalently, 正雄 is the forename as well as the last name.