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In the world, Koyasu (子安 , Koyasu
) is quite a common principally boy's, but very infrequently girly given name. The first name Koyasu is characteristic of Eastern Asia, particularly China, where it is a rare principally masculine, but scarcely female name. Very seldom, Koyasu is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| 子安 | China |
| Koyasu | Japan, Indonesia, United States, China, Germany |
Koyasu is also a name for the fictitious and mythical characters: .