Surname O'Tuama (O'Tuama 
) , around the world, is a very rare cognomen. The surname O'Tuama is habitual in Ireland, where it is a rare surname, the United Kingdom, where it is a very rare surname, and Canada, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| O'Tuama | Canada, United States, Ireland, United Kingdom |
| cillian o'tuama Ph.D. University College Cork 2014 |
|