Last name Ruohan (Ruohan 
) , globally, is a very rare cognomen. The last name Ruohan is habitual in Singapore, where it is a very rare surname, Myanmar, and the United States, where it is an extremely rare surname. Predominantly, Ruohan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ruohan | China, Australia, Taiwan, United States, Myanmar |
| john baptist wang ruohan bishop of the Roman Catholic Church (b. 1950) |
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| john wang ruohan catholic bishop (ch-id: wanruo) |
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