Family name Cathmhaoil (Cathmhaoil 
) , around the world, is a very rare last name. The last name Cathmhaoil is habitual in Northern Europe, particularly Ireland, where it is a rare surname, and the United Kingdom, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Cathmhaoil | Ireland, United Kingdom |
|
aodh mac cathmhaoil Irish Franciscan Archbishop of Armagh, IE (b. 1571) |
|
| art mac cathmhaoil |
|
|
| brian mac cathmhaoil |
|