Surname Dayaratna (Dayaratna 
) , in all the world, is quite a rare family name. The surname Dayaratna is habitual in Sri Lanka, where it is quite a rare surname, Canada, where it is an extremely rare surname, and the United States. Much less frequently, Dayaratna is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dayaratna | Spain, Italy, United States, India, Sri Lanka |