Last name Kaig (凯尔 
, Kaig 
) , in the world, is a rare cognomen. The last name Kaig is habitual in Iraq, where it is a very rare surname, China, and Canada, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in China, Iraq, and India. More frequently, Kaig is the forename as well as the last name.