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Cognomen Buyan (Buyan
, Буян
, Буиан
) , all over the world, is quite a common family name. The surname Buyan is characteristic of Mongolia, where it is quite a common surname, Belarus, where it is quite a rare surname, and Philippines. In absolute terms, it is the most numerous in Philippines, Bangladesh, and Mongolia. Much less frequently, Buyan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Buyan | India, Bangladesh, Mongolia, Philippines, Turkey |
| Буян | Ukraine, Kazakhstan, Georgia, Russia, Belarus |
| Буиан | Russia |