Family name Mc Elroy (Mc Elroy 
) , in the entire world, is a rare surname. The last name Mc Elroy is characteristic of Ireland, where it is quite a rare surname, Costa Rica, where it is a rare surname, and Nicaragua. Not in comparison with a country's population, it most frequently occurs in the United States, Ireland, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Mc Elroy | Costa Rica, Canada, United Kingdom, United States, Ireland |