Across the world, Rezaul (Rezaul 
, রেজাউল ) is a common masculine first name. The first name Rezaul is characteristic of Bangladesh, where it is quite a common masculine name, Oman, where it is quite a common primarily male, but very seldom female name, and Qatar, where it is quite a rare boy's name. Not in comparison with a country's population, it is commonest in Bangladesh, India, and Saudi Arabia. Much less frequently, Rezaul is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Rezaul | Saudi Arabia, India, Bangladesh, United Arab Emirates, Oman |
| রেজাউল | Bangladesh |
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rezaul kabir Belgian economist, BD |
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| rezaul bari dina Bangladeshi politician (b. 1951) |
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| rezaul haque chess player (b. 1959) |
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| rezaul karim rehan Bangladeshi footballer, BD (b. 1968) |
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| rezaul md. karim Ph.D. Hasselt University and Katholieke Universiteit Leuven 2019 |
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| rezaul alam khandaker Bangladeshi politician |
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| rezaul azim researcher |
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| islam md rezaul researcher |
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| rezaul karim khan researcher (ORCID 0000-0002-7736-3278) |
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| rezaul karim Bangladeshi politician |
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| rezaul alam chowdhury Ph.D. University of Texas at Austin 2007 |
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| rezaul hasan researcher (ORCID 0000-0003-0428-3311) |
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| rezaul haque sarkar Bangladeshi politician |
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Sk, Korim, Rasel, Rubel, Hasan, Haque, Hoque, Islam, Mondal, Sarkar, Sarker, Shaikh, Sheikh, Sikder, Ansari, Kareem, Laskar, Hassan, Haider, Bhuiyan, Hossain, Hussain, Kabir, Choudhury, Karim, Ahmed, Haq, Hoq, Huq, Miah, Sekh, Alam, Alom, Amin, Azim, Bari, Khan, Rana, Raju, Razu, Rony, Reza, Gazi, Molla, Miyan, Sheik, Sumon, Ahsan, and Chowdhury