Cognomen Janyalak (Janyalak 
) , all over the world, is an extremely rare family name. The cognomen Janyalak is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more prevalently, Janyalak is the forename as well as the last name.
Gowan, Sannam, Kedsaboot, Saennam, Pirasao, Vichitchua, Sampaongoen, Sitthinam, Khumthong, Phansawat, Jaroenmuk, Changprakob, and Jongrakklang