Last name Riawan (Riawan 
) , all around the world, is quite a common surname. The family name Riawan is habitual in Indonesia, where it is quite a rare surname, Malaysia, where it is a rare surname, and Pakistan, where it is a very rare surname. Very seldom, Riawan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Riawan | Malaysia, Pakistan, India, Nigeria, Indonesia |
| ady riawan Indonesian politician (born 1971 in Banjarmasin), ID (b. 1971) |
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| wibi riawan researcher (ORCID 0000-0001-5822-3846) |
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| edi riawan ID |
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