Cognomen Mulphy (Mulphy 
) , in all the world, is a very rare surname. The surname Mulphy is characteristic of Malaysia, where it is a very rare surname, Philippines, and Venezuela, where it is an extremely rare surname. Likewise, Mulphy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mulphy | Philippines, Venezuela, Malaysia, India |