In the entire world, 克一 (Keyi 
, 克一 ) is a rare largely masculine, but seldom girly first name. The first name 克一 is habitual in South Africa, where it is a very rare epicene name, Tanzania, where it is a very rare male name, and China, where it is a very rare predominantly male, but very seldom female name. Measured by absolute frequency, it is commonest in China, India, and Nigeria. Also, 克一 is the last name as well as the forename.