Family name Nephthys (Nephthys 
) , in the world, is an extremely rare last name. The family name Nephthys is characteristic of New Zealand, where it is a very rare surname, and Mexico, where it is an extremely rare surname. More prevalently, Nephthys is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nephthys | Belgium, Mexico, United States, Canada, New Zealand |