Surname เรียว (Taper 
, Ryeo 
, Riao 
) , in the world, is quite a rare cognomen. The last name เรียว is characteristic of Malaysia, where it is quite a rare surname, South Korea, where it is a rare surname, and Egypt. Measured by absolute frequency, it is commonest in Malaysia, the United States, and South Korea. Likewise, เรียว is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Taper | United Kingdom, Poland, United States, Malaysia, India |
| Ryeo | South Korea, Canada, Vietnam, United States, Malaysia |
| Riao | Indonesia, United States, Malaysia, Egypt, India |
| เรียว | Thailand |