In the world, O'Leary (O'Leary 
, או'לירי 
) is an extremely rare boy's first name. Much more prevalently, O'Leary is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| O'Leary | Australia, Canada, United Kingdom, United States, Ireland |
| או'לירי | Israel |
O'Leary is also a name for the fictitious and mythical characters: .
|
humphrey o'leary New Zealand judge (1886-1953), NZ (b. 1886) |
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| grattan o'leary Canadian politician (1888-1976), CA (b. 1888) |
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| dostaler o'leary Canadian journalist; Quebec nationalist activist, CA (b. 1908) |
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| pierce o'leary Irish footballer, IE (b. 1959) |
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| allen o'leary 1986:1999 - New Zealand playwright |
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| fenton o'leary researcher |
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| chandler o'leary researcher |
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| fletcher o'leary Australian actor, AU (b. 1997) |
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