Family name Mahadiulwewa (Mahadiulwewa 
) , worldwide, is a rare surname. The family name Mahadiulwewa is habitual in Sri Lanka, where it is quite a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Mahadiulwewa | United States, Sri Lanka |
| s. h. mahadiulwewa Sri Lankan politician, LK (b. 1906) |
|