Around the globe, 唯丹 (唯丹 
) is a rare gender-neutral forename. The forename 唯丹 is characteristic of Eastern Asia, particularly China, where it is a very rare epicene name. Much less frequently, 唯丹 is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| 唯丹 | China |