Family name Mc Swiggan (Mc Swiggan 
) , in all the world, is a very rare last name. The last name Mc Swiggan is characteristic of Ireland, where it is a rare surname, the United Kingdom, where it is a very rare surname, and Spain, where it is an extremely rare surname. In absolute terms, it is commonest in the United Kingdom, Ireland, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Mc Swiggan | Ireland, Spain, United Kingdom, United States |