Family name Kairan (凯然 
, Kairan 
, 开然 ) , all over the world, is quite a rare last name. The surname Kairan is characteristic of Malaysia, where it is a rare surname, Philippines, and Saudi Arabia, where it is a very rare surname. In absolute terms, it is the most numerous in China, Philippines, and Malaysia. More frequently, Kairan is the forename as well as the last name.