Cognomen Najmuddin (Najmuddin 
, Наймуддин 
, นัจมุดดิน 
) , all around the world, is quite a rare last name. The cognomen Najmuddin is characteristic of United Arab Emirates, where it is quite a rare surname, Malaysia, and Bahrain. Not in comparison with a country's population, it is the most numerous in Indonesia, India, and Malaysia. Likewise, Najmuddin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Najmuddin | Saudi Arabia, Malaysia, India, Indonesia, Afghanistan |
| Наймуддин | Russia |
| นัจมุดดิน | Thailand |
| yusuf najmuddin religious figure in Dawoodi Bohra Islam, IN (b. 1764) |
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| abdul qadir najmuddin 47th Da'i al-Mutlaq of Dawoodi Bohra sect, IN (b. 1814) |
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taha najmuddin Indian imam, IN (b. 1975) |
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| shree najmuddin Indian politician, former member of the Bihar Legislative Assembly for the Bahadurganj constituency, serving from 1980 to 1990, IN (b. 1928) |
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| dilshad najmuddin Pakistani civil servant (b. 1937) |
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| abu saleh najmuddin former legislature of Assam |
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| asif najmuddin researcher |
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