Worldwide, Kulsak (กุลศักดิ์ 
, Kulsak 
) is a very rare largely masculine, but uncommonly feminine first name. The forename Kulsak is habitual in Thailand, where it is a very rare primarily boy's, but very infrequently female name, and India, where it is an extremely rare feminine name. Also, Kulsak is the last name as well as the forename.