Worldwide, O'Hearn (O'Hearn 
) is an extremely rare unknown gender first name. Much more frequently, O'Hearn is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| O'Hearn | Canada, New Zealand, Australia, United Kingdom, United States |
| taylor w. o'hearn American politician (1907-1997), US (b. 1907) |
|