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 | Poland, United Kingdom, United States, India, Malaysia |
| Ryeo | Canada, Vietnam, United States, South Korea, Malaysia |
| Riao | Egypt, United States, India, Indonesia, Malaysia |
| เรียว | Thailand |