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Across the world, Siàn (宪 , 憲
, Siàn) is a common epicene first name. The first name Siàn is habitual in Eastern Asia, particularly China, where it is quite a rare epicene name. Very seldom, Siàn is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| 宪, 憲 | China |