Throughout the world, Ratchasak (ราชศักดิ์ 
, Ratchasak ) is quite a rare predominantly male, but very infrequently feminine forename. The forename Ratchasak is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare principally boy's, but scarcely girly name. Much less frequently, Ratchasak is the last name as well as the forename.
Samam, Kaewmala, Khajontraveechok, Pornchuen, Taweesri, Wongngern, Chauychuwong, Potjanaaree, Plubplung, Rueangsri, Rueangchai, Jantawaree, Tananimit, Wangkwamchop, Kaewwichian, Kulchaiyakul, Thammakumpee, Wiriyaphan, Somyanonthanakul, Chalongkulsak, Suwanchatree, Thanapornsin, Chumsang, Soontorn, Siramput, Sawekvapee, Demoh, Yajit, Susewi, Buabut, Kitima, Phetla, Ranron, Eaimvijarn, Yeuram, Saochun, Buranapanichkit, Sengmee, Arunrot, Chochun, Boripan, Buachey, Petsong, Pornarchaphipat, Ragsuwong, Lekyindee, Junrung, Hanwanchai, Arunroj, and Tassananutriyhakul