Cognomen วันสวัสดิ์ (วันสวัสดิ์ 
, Wondsawad , Good Day) , around the world, is a rare surname. The surname วันสวัสดิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, วันสวัสดิ์ is the forename as well as the last name.