Cognomen Sthu (Sthu 
, สตูล 
) , in the world, is a rare family name. The family name Sthu is habitual in Myanmar, where it is a rare surname, Thailand, where it is a very rare surname, and South Africa, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Myanmar, Thailand, and India. More prevalently, Sthu is the forename as well as the last name.