All over the world, Bailley (Bailley 
) is a very rare epicene forename. The forename Bailley is characteristic of Aland Islands, where it is quite a common female name, and the United States, where it is an extremely rare dominantly female, but seldom boy's name. Likewise, Bailley is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Bailley | Australia, Canada, Argentina, United States, United Kingdom |