>
Last name ตงตง (Dongdong , ตงตง , Tongtoung) , around the world, is quite a rare cognomen. The last name ตงตง is habitual in Taiwan, where it is a rare surname, Philippines, and Singapore, where it is a very rare surname. Measured by absolute frequency, it is commonest in China, Philippines, and Indonesia. Much more frequently, ตงตง is the forename as well as the last name.