Cognomen ตรีศูล (Trishul 
, ตรีศูล 
, Trisu 
) , around the globe, is a rare surname. The surname ตรีศูล is characteristic of India, where it is a very rare surname, Argentina, where it is an extremely rare surname, and the United States. Much more prevalently, ตรีศูล is the forename as well as the last name.