Cognomen Hairt (Hairt 
) , around the world, is an extremely rare last name. The surname Hairt is habitual in Southern Asia, particularly India, where it is an extremely rare surname. More prevalently, Hairt is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hairt | India |
|
aodán ó hairt Irish hurler, IE (b. 1988) |
|
| john ó hairt Roman Catholic bishop |
|
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| brian ó hairt |
|