Last name Sivarak (Sivarak 
) , in the world, is a very rare family name. The surname Sivarak is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. More prevalently, Sivarak is the forename as well as the last name.
Rajsuchat, Wongsanurak, Thongpitak, Thammapiwan, Phinicharomna, Kijwattanaphokin, Chutipong, Vangbooncong, Wongsanurug, Tawarotip, Thomrung, Thanedbovorn, Jundang, Daduang, Klinhrom, Klinhom, Jandee, Jomtharak, and Phachansiri