Surname Bailley (Bailley 
) , all over the world, is a rare cognomen. The family name Bailley is characteristic of Australia, where it is a very rare surname, the United States, and Canada. In absolute terms, it is the most numerous in the United States, Australia, and the United Kingdom. Likewise, Bailley is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bailley | Australia, Aland Islands, Argentina, United Kingdom, United States |
| john bailley Australian rower, AU (b. 1960) |
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| gilles bailley researcher (b. 1982) |
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