Cognomen دياب (دياب 
, Diab 
, Diyab ) , around the globe, is a widespread surname. The family name دياب is habitual in Lebanon, where it is a common surname, Egypt, and Syria (explore the name in all countries). Very seldom, دياب is the forename as well as the last name.
| VARIANT | COUNTRY |
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| دياب | Saudi Arabia, Palestinian Territory, Syria, Egypt, Sudan |
| Diab, Diyab | Saudi Arabia, Syria, Sudan, Egypt, Lebanon |
| نجيب دياب Syrian nationalist, journalist and publish (1870-1936), LB (b. 1870) |
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كنينة دياب Syrian children's writer, SY (b. 1948) |
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رشيد دياب Sudanese painter, SD (b. 1957) |
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حسان دياب Lebanese engineer, academic and minister of higher education, LB (b. 1959) |
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عمرو دياب Egyptian singer, composer, and actor., EG (b. 1961) |
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| دياب عبيد Israeli politician, IL (b. 1911) |
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| دياب الماشي Syrian politician, SY (b. 1915) |
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جهاد أحمد مصطفى دياب United States' Guantanamo Bay detention camp detainee, SY (b. 1971) |
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| حسن دياب Egyptian journalist, EG (b. 1926) |
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محمد دياب Egyptian screenwriter and director, EG (b. 1978) |
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| علي دياب Lebanese actor, LB (b. 1928) |
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مايا دياب Lebanese singer, entertainer, actress and television personality, LB (b. 1980) |
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علي دياب Syrian footballer, SY (b. 1982) |
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| محمود دياب Egyptian writer (1932-1983), EG (b. 1932) |
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| إسماعيل دياب Egyptian novelist, EG (b. 1936) |
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