Family name Abayaratna (Abayaratna 
) , across the world, is a rare cognomen. The cognomen Abayaratna is habitual in Sri Lanka, where it is quite a rare surname, Australia, where it is a very rare surname, and Canada, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in Sri Lanka, Australia, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Abayaratna | Australia, Canada, United States, United Kingdom, Sri Lanka |