Cognomen Sikham (Sikham 
, ศรีคำ) , all over the world, is a rare family name. The last name Sikham is characteristic of Thailand, where it is a rare surname, the United Kingdom, where it is a very rare surname, and Canada, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Thailand, India, and the United States. More frequently, Sikham is the forename as well as the last name.