Cognomen ספי (Sefi 
, Seffy 
, Seffi 
) , all over the world, is quite a common surname. The surname ספי is habitual in Tunisia, where it is quite a rare surname, Israel, and North Macedonia, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in India, Nigeria, and Tunisia. Also, ספי is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sefi | Tunisia, Nigeria, Indonesia, Ethiopia, India |
| Seffy | Nigeria, Indonesia, United States, Israel, India |
| Seffi | Germany, Tunisia, Nigeria, Indonesia, India |
| ספי | Israel |