Family name Sef (سيف 
, Siv 
, Sef 
) , worldwide, is a widespread cognomen. The cognomen Sef is habitual in Western Asia, particularly Yemen, where it is quite a common surname, Jordan, and Palestinian Territory (explore the name in all countries). In absolute terms, this name is the most popular in Egypt, Yemen, and Iraq. More frequently, Sef is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| سيف | Iran, Yemen, Egypt, Jordan, Iraq |
| Siv | Sweden, Norway, Indonesia, Saudi Arabia, India |
| Sef | Ethiopia, Morocco, Algeria, Egypt, India |
| Сеф | Armenia, Russia |
Safe, Sandr, Seave, Sevi, Simin, Sofa, Sèf, Sègh, Sèph, Séf, Séph, Sêf, Sêph, Sëf, Sëph, Sēf, Sĕf, Sėf, Sęf, Sęph, Sěf, Ys, Ysef, Yssef, Zeef, Çef, Çèf, Çéf, Çêf, Çëf, Çēf, Çĕf, Çėf, Çęf, Çěf, Śef, Śèf, Śéf, Śêf, Śëf, Śëph, Śēf, Śĕf, Śėf, Śęf, Śěf, Ŝëf, Ŝěf, Šef, Šèf, Šéf, Šêf, Šëf, Šēf, Šĕf, Šęf, Šěf, Сэф, Ṩễf, 瑟夫, and 色夫
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