Last name ศิวาลัย (ศิวาลัย 
, Siwalai 
, Sivalai 
) , worldwide, is a rare cognomen. The last name ศิวาลัย is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. More frequently, ศิวาลัย is the forename as well as the last name.