Surname Сейфи (Seyfi 
, Seifi 
, Сейфи 
) , in all the world, is quite a common last name. The cognomen Сейфи is habitual in Eswatini, where it is quite a rare surname, Turkey, and Iran. Measured by absolute frequency, the name is most common in Turkey, Iran, and the United States. More frequently, Сейфи is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Seyfi | Turkey, Azerbaijan, Germany, Iran, United States |
| Seifi | Turkey, Iran, United Arab Emirates, United States, Argentina |
| Сейфи | Kyrgyzstan, Kazakhstan, Russia |
| Sejfi | Italy, North Macedonia, Switzerland, Croatia, Eswatini |
| сейфи, талгат фатыхович Soviet aircraft engineer, scientist and technologist (1916-1969), RU (b. 1916) |
|