All over the world, Deyan (Deyan 
, 德岩 , Деян 
) is quite a common dominantly male, but seldom feminine forename. The first name Deyan is characteristic of Bulgaria, where it is quite a common masculine name, Malta, where it is quite a rare male name, and Cyprus. Not in comparison with a country's population, it is the most numerous in Bulgaria, China, and Indonesia. Very seldom, Deyan is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Deyan | China, Indonesia, Bulgaria, India, Venezuela |
| 德焱, 德岩 | China |
| Деян | Russia, Ukraine, Bulgaria, Belarus |
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deyan ranko brashich New York City attorney, author and columnist (1940-2019), RS (b. 1940) |
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deyan sudjic British writer and broadcaster, GB (b. 1952) |
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deyan razlozhki sportsperson, BG |
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| deyan kolev Bulgarian gymnast, BG (b. 1965) |
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| deyan yordanov Bulgarian gymnast, BG (b. 1976) |
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| deyan vatchkov Bulgarian opera singer, BG (b. 1979) |
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| deyan he researcher (ORCID 0000-0002-5744-3334) |
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| deyan l dzhenkov researcher |
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| wu deyan Song dynasty person CBDB = 137223 |
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| deyan draganov researcher, ORCID id # 0000-0001-8606-1178, NL |
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| deyan y yosifov researcher |
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| deyan wu researcher |
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| deyan radev Dr. rer. pol. Johannes Gutenberg-Universität Mainz 2013 |
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| deyan neychev researcher ORCID ID = 0000-0001-6792-4652 |
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| deyan mavrov researcher |
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