In the world, Gayashan (Gayashan 
) is quite a rare boy's given name. The first name Gayashan is habitual in Southern Asia, particularly Sri Lanka, where it is quite a common boy's name. Likewise, Gayashan is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Gayashan | United Kingdom, Australia, Sri Lanka, United States, United Arab Emirates |
| gayashan chathuranga researcher |
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| gayashan m. arachchige Sri Lankan echinodermologist, LK |
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| gayashan munasinghe Italian cricketer, LK (b. 1986) |
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| gayashan nawananda Sri Lankan physician, politician and Member of Parliament (b. 1990) |
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