Family name Rajakarunanayake (Rajakarunanayake 
) , worldwide, is a rare last name. The cognomen Rajakarunanayake is characteristic of Sri Lanka, where it is a rare surname, New Zealand, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Sri Lanka, the United States, and New Zealand.
| VARIANT | COUNTRY |
|---|---|
| Rajakarunanayake | Canada, New Zealand, United States, United Kingdom, Sri Lanka |