Surname Sumanapala (Sumanapala 
) , in the entire world, is quite a rare last name. The surname Sumanapala is characteristic of Southern Asia, particularly Sri Lanka, where it is quite a rare surname. Very seldom, Sumanapala is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sumanapala | Sri Lanka, Canada, Philippines |
| sumanapala dahanayake Sri Lankan politician (b. 1929) |
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| rathna sumanapala Sri Lankan actor (b. 1940) |
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| raja sumanapala Sri Lankan actor, LK (b. 1942) |
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| amila prasanna sumanapala Sri Lankan field researcher studying Odonata |
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