Cognomen ツヤ (Tuya 
, ツヤ 
) , across the world, is quite a common surname. The family name ツヤ is characteristic of Mongolia, where it is quite a common surname, Peru, where it is quite a rare surname, and Uruguay. In absolute terms, it is the most numerous in Mongolia, Tanzania, and Philippines. Likewise, ツヤ is the forename as well as the last name.