Family name ทรอย (Soi 
, ทรอย 
, Troyd 
) , throughout the world, is a common surname. The cognomen ทรอย is characteristic of Kenya, where it is quite a rare surname, Macao, and Malaysia. Measured by absolute frequency, it is the most numerous in Kenya, India, and Indonesia. Likewise, ทรอย is the forename as well as the last name.