Last name سيف (سيف 
, Saif 
, Seif 
, and others...) , in all the world, is a widespread family name. The last name سيف is characteristic of Oman, where it is a common surname, Egypt, and Dominica (explore the name in all countries). Measured by absolute frequency, it is commonest in Egypt, Tanzania, and Bangladesh. More prevalently, سيف is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| سيف | Iran, Yemen, Iraq, Jordan, Egypt |
| Saif, Sef | Tanzania, Tunisia, Iraq, Pakistan, Egypt |
| Seif | Tanzania, Algeria, Tunisia, Iraq, Egypt |
| Sif | Tunisia, Iraq, Bangladesh, Pakistan, Egypt |
| Sayf | Algeria, Tunisia, Iraq, Bangladesh, Egypt |
| Seef | Saudi Arabia, Iraq, Sudan, Pakistan, Egypt |
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صلاح أبو سيف Egyptian film director (1915–1996), EG (b. 1915) |
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سمير سيف Egyptian film director (1947-2019), EG (b. 1947) |
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عاطف أبو سيف Palestinian writer, Fatah spokesman in Gaza, PS (b. 1973) |
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فيصل سيف association football player, SA (b. 1978) |
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منى سيف Egyptian activist, EG (b. 1986) |
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شيماء سيف Egyptian actress, EG (b. 1987) |
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| وحيد سيف Egyptian actor, EG (b. 1939) |
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| وليد سيف Palestinian writer, PS (b. 1948) |
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| رياض عودة سيف Palestinian screenwriter and poet, PS (b. 1949) |
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| مصطفى علوي سيف Political Science Professor at Cairo University, EG (b. 1950) |
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| آدم سيف Yemeni actor, YE (b. 1957) |
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| أشرف سيف Egyptian actor, EG (b. 1962) |
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| ناصر سيف Egyptian actor, EG (b. 1966) |
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| أسعد سيف archaeologist, LB (b. 1967) |
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| ياسر سيف actor, BH (b. 1968) |
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علي, الباشا, الشمري, الطائي, الإسلام, الملكي, الكعبي, العامري, العراقي, العبيدي, العزاوي, العتيبي, الساعدي, الدليمي, الجبوري, الربيعي, الخفاجي, التميمي, المالكي, الموسوي, الكناني, ابراهيم, الحنين, عبدالله, الحربي, محمود, سعد, حسن, الحق, احمد, عباس, سعيد, حسين, حيدر, خالد, صالح, صلاح, محمد, ناصر, نبيل, كريم, قاسم, يوسف, الدين, الملك, النار, النصر, العنزي, and البصراوي