Last name Mhathúna (Mhathúna 
) , throughout the world, is a very rare cognomen. The family name Mhathúna is habitual in Northern Europe, particularly Ireland, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Mhathúna | Ireland |
|
máire rua ní mhathúna Irish aristocrat, IE (b. 1615) |
|
| bríd ní mhathúna Irish writer, journalist and folklorist, IE (b. 1922) |
|