Cognomen Valailak (Valailak 
) , all around the world, is an extremely rare surname. Much more prevalently, Valailak is the forename as well as the last name.
Nara, Tharangsee, Jaruapornprateep, Laosuttiwong, Wanpontong, Wannasri, Rathsasombath, Chaolert, Vanishapivong, Atiyossapong, Nuiphan, Jingjit, Kaewjuk, Suebsai, Simsang, Jaiarj, Phohnggonggeon, Mitchell, and Vidhyanukroh