Surname ตื้น (Tuen 
, ตื้น) , all over the world, is quite a rare cognomen. The last name ตื้น is characteristic of British Virgin Islands, where it is quite a common surname, Hong Kong, where it is quite a rare surname, and Norway. Measured by absolute frequency, it is the most numerous in Hong Kong, Malaysia, and China. Likewise, ตื้น is the forename as well as the last name.