Last name Mallawarachchi (Mallawarachchi 
) , in the world, is quite a rare surname. The cognomen Mallawarachchi is characteristic of Sri Lanka, where it is quite a common surname, Australia, where it is a rare surname, and United Arab Emirates.
| VARIANT | COUNTRY |
|---|---|
| Mallawarachchi | United Arab Emirates, Sri Lanka, Australia, Italy, New Zealand |
| d. mallawarachchi badminton player, LK (b. 1948) |
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| chandana h mallawarachchi researcher (ORCID 0000-0003-4238-8931) |
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| navoda s m s m mallawarachchi researcher (ORCID 0000-0001-5323-3367) |
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