Surname Koswatte (Koswatte 
) , in all the world, is a rare last name. The cognomen Koswatte is characteristic of Sri Lanka, where it is quite a rare surname, Italy, where it is a very rare surname, and Canada, where it is an extremely rare surname. Much less frequently, Koswatte is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Koswatte | Italy, Canada, United States, Sri Lanka, United Kingdom |