Surname กลางวัน (Dayal 
, Dayam 
, Dayve 
) , around the globe, is a widespread last name. The surname กลางวัน is habitual in Fiji, where it is a common surname, India, where it is quite a common surname, and Qatar, where it is quite a rare surname. Measured by absolute frequency, it most frequently occurs in India, Fiji, and the United States. Very seldom, กลางวัน is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dayal | India, Bangladesh, Sri Lanka, United States, Fiji |
| Dayam | Philippines, Saudi Arabia, India, United States, Pakistan |
| Dayve | Philippines, Myanmar, Mexico, United States, Democratic Republic of the Congo |
| กลางวัน | Thailand |
พลนาคู, and แสนมังกาละ