Family name Kailang (开朗 
, 开浪 , Kailang 
) , in the entire world, is a rare last name. The last name Kailang is habitual in China, where it is a very rare surname, Spain, and Philippines, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in China, Spain, and India. More prevalently, Kailang is the forename as well as the last name.