Cognomen Hewamadduma (Hewamadduma 
) , in all the world, is a rare last name. The family name Hewamadduma is habitual in Sri Lanka, where it is quite a rare surname, New Zealand, where it is a very rare surname, and Canada, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Hewamadduma | Canada, New Zealand, United States, United Kingdom, Sri Lanka |
| amara hewamadduma Sri Lankan historian, LK (b. 1939) |
|