Surname Sumarto (Sumarto 
) , in the entire world, is a common last name. The cognomen Sumarto is habitual in Indonesia, where it is quite a common surname, Malaysia, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Sumarto is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sumarto | Singapore, United States, Indonesia, Malaysia, China |
| siswanda h sumarto Indonesian politician (born 1960 in Klaten), ID (b. 1960) |
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| sumarto wonowidjojo ID (b. 1960) |
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| sudarno sumarto Ph.D. Vanderbilt University 1996 |
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