Cognomen Mc Arthy (Mc Arthy 
) , in all the world, is an extremely rare family name. The surname Mc Arthy is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Much less frequently, Mc Arthy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mc Arthy | United States, Philippines |