In the entire world, 桓桓 (桓桓 
) is a rare gender-neutral first name. The forename 桓桓 is characteristic of Eastern Asia, particularly China, where it is an extremely rare gender-neutral name. Very seldom, 桓桓 is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| 桓桓 | China |