Surname Mc Laughlin (Mc Laughlin 
) , in the world, is quite a rare family name. The surname Mc Laughlin is characteristic of Ireland, where it is quite a common surname, Honduras, where it is quite a rare surname, and the United Kingdom. Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Ireland.
| VARIANT | COUNTRY |
|---|---|
| Mc Laughlin | Canada, Honduras, United Kingdom, United States, Ireland |