Surname สิริวรรธนะ (Siriwardena 
, สิริวรรธนะ 
) , around the world, is a common family name. The surname สิริวรรธนะ is habitual in Sri Lanka, where it is quite a common surname, United Arab Emirates, where it is a rare surname, and Switzerland. In absolute terms, the name is most common in Sri Lanka, Australia, and United Arab Emirates. Much less frequently, สิริวรรธนะ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siriwardena | Australia, United Arab Emirates, Indonesia, Sri Lanka, Switzerland |
| สิริวรรธนะ | Thailand |