Worldwide, 旦一 (旦一 
) is a rare dominantly masculine, but uncommonly feminine given name. The forename 旦一 is habitual in Eastern Asia, particularly China, where it is a very rare dominantly boy's, but infrequently feminine name. Much less frequently, 旦一 is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| 旦一 | China |