Family name Kalong (กาหลง 
, Kalong 
, 加隆 
) , globally, is quite a common cognomen. The cognomen Kalong is habitual in South-eastern Asia, particularly Brunei, where it is quite a rare surname, Thailand, and Malaysia. Measured by absolute frequency, this name is the most popular in South-eastern Asia, particularly Thailand, Malaysia, and Indonesia. Also, Kalong is the forename as well as the last name.