Last name Ydw (Ydw 
) , worldwide, is a very rare cognomen. The family name Ydw is habitual in Thailand, where it is a very rare surname, and China, where it is an extremely rare surname. Likewise, Ydw is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ydw | China, United States, Thailand |