Family name โสตถิสุข (โสตถิสุข 
) , all over the world, is a very rare cognomen. The surname โสตถิสุข is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, โสตถิสุข is the forename as well as the last name.
โชติกร, กิตติยา, and อรรถสิทธิ์