Cognomen Osulivan (Osulivan 
) , around the world, is a very rare surname. The surname Osulivan is characteristic of Ireland, where it is a rare surname, the United Kingdom, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Osulivan | Canada, Brazil, United States, United Kingdom, Ireland |