Last name ต่อย (Toi 
, Stung , ต่อย) , in all the world, is quite a common family name. The surname ต่อย is characteristic of Macao, where it is quite a rare surname, Qatar, and Mauritius. Measured by absolute frequency, it is commonest in Algeria, Malaysia, and Vietnam. Also, ต่อย is the forename as well as the last name.