Cognomen สิกข์ (Sik 
, สิกข์) , in all the world, is a common last name. The cognomen สิกข์ is habitual in Taiwan, where it is quite a rare surname, Hungary, and Malaysia. Not in comparison with a country's population, it is the most numerous in Eastern Asia, particularly China, South Korea, and Taiwan. Likewise, สิกข์ is the forename as well as the last name.