Last name Suthi (สุธี 
, สุทธิ , Suthi 
) , around the world, is quite a common family name. The cognomen Suthi is characteristic of Thailand, where it is quite a rare surname, Saudi Arabia, where it is a rare surname, and the United Kingdom, where it is a very rare surname. In absolute terms, it is the most numerous in Thailand, India, and the United Kingdom. More frequently, Suthi is the forename as well as the last name.