Family name วันอยู่ (Days 
, วันอยู่) , in the entire world, is quite a common last name. The surname วันอยู่ is habitual in Botswana, where it is quite a rare surname, Egypt, and Myanmar, where it is a rare surname. Measured by absolute frequency, it is the most numerous in the United States, Egypt, and Indonesia. Much less frequently, วันอยู่ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Days | Indonesia, Saudi Arabia, Egypt, United States, Myanmar |