Family name Seffy (Seffy 
) , in the world, is a rare last name. The family name Seffy is habitual in Indonesia, where it is a very rare surname, Nigeria, where it is an extremely rare surname, and the United States. Measured by absolute frequency, it is commonest in Indonesia, Nigeria, and India. More prevalently, Seffy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Seffy | United States, India, Indonesia, Nigeria, Malaysia |