Around the world, Bairn (Bern 
, Barn 
, Bairn 
) is quite a rare unisex given name. The forename Bairn is habitual in Cameroon, where it is a rare epicene name, Qatar, where it is a rare boy's name, and Hong Kong, where it is a rare gender-neutral name. Measured by absolute frequency, the name is most common in the United States, the Democratic Republic of the Congo, and India. Likewise, Bairn is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Bern | Kenya, Germany, Switzerland, United States, Sweden |
| Barn | Germany, Canada, United States, Sweden, France |
| Bairn | United Kingdom, Canada, United States, Philippines, India |