Cognomen بلحاج (Belhadj 
, Belhaj , بلحاج 
) , throughout the world, is a common family name. The surname بلحاج is habitual in Northern Africa, particularly Tunisia, where it is a common surname, Algeria, where it is quite a common surname, and Morocco (explore the name in all countries). Very seldom, بلحاج is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Belhadj, Belhaj | Tunisia, Morocco, Algeria, Libya, France |
| بلحاج | Saudi Arabia, Tunisia, Morocco, Algeria, Libya |
| Benhadj | Germany, Tunisia, Morocco, Algeria, France |
| بلحاج بوشعيب Algerian politician (1918-2012), DZ (b. 1918) |
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| علي بلحاج Algerian politician, DZ (b. 1956) |
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| عبد الحكيم بلحاج Libyan Islamists and military commander, LY (b. 1966) |
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| سفيان بلحاج Belgian-Tunisian political activist, TN (b. 1983) |
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| يوسف بلحاج MA (b. 1977) |
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| فاطمة بلحاج DZ |
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