Worldwide, Ruiyan (Ruiyan 
) is a very rare predominantly feminine, but very seldom male given name. The first name Ruiyan is habitual in Indonesia, where it is a very rare female name, China, where it is an extremely rare female name, and India, where it is an extremely rare epicene name. Very seldom, Ruiyan is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Ruiyan | Thailand, United States, India, Indonesia, China |
| ruiyan shiyan (b. 850) |
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| ruiyan guo researcher |
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| ruiyan li researcher (ORCID 0000-0001-8545-5028) |
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| ruiyan fu researcher (ORCID 0000-0002-8230-7860) |
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| ruiyan zhang researcher (ORCID 0000-0002-6739-2075) |
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| ruiyan yuan researcher |
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| ruiyan zhang Ph.D. Chinese Academy of Sciences 2016 |
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| ruiyan zhang researcher (ORCID 0000-0001-8556-8145) |
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| ruiyan sun researcher (ORCID 0000-0002-1375-195X) |
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| ruiyan wu researcher |
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| ruiyan niu researcher |
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| ruiyan zhang researcher (ORCID 0000-0003-3163-9539) |
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