Last name Saifuddin (Saifuddin 
, Сайфутдин 
, ซัยฟุดดีน 
) , in the world, is a common cognomen. The cognomen Saifuddin is habitual in Brunei, where it is quite a common surname, Malaysia, where it is quite a rare surname, and United Arab Emirates. Measured by absolute frequency, it most frequently occurs in Indonesia, Bangladesh, and Malaysia. More prevalently, Saifuddin is the forename as well as the last name.
| moulana abdeali saifuddin (b. 1775) |
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taher saifuddin 51st Da'i al-Mutlaq of Dawoodi Bohra sect, IN (b. 1888) |
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syedna mufaddal saifuddin The 53rd Dai al-Mutlaq of the Dawoodi Bohras, IN (b. 1946) |
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lukman hakim saifuddin Indonesian politician, ID (b. 1962) |
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| muhammad abdul haseeb saifuddin (b. 1923) |
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| fahmi d. saifuddin politicians and religious character from Indonesia (1942-2002) (b. 1942) |
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| achmad fedyani saifuddin Indonesian anthropologist, ID (b. 1952) |
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| ongka muhammad saifuddin ID (b. 1959) |
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| acep saifuddin ID (b. 1964) |
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| mirza prameswari saifuddin Indonesian politician (born 1977), ID (b. 1977) |
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| abdeali saifuddin Indian Muslim leader |
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| mohammad saifuddin researcher (ORCID 0000-0002-6063-967X) |
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| fatema a saifuddin researcher |
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| aamir saifuddin researcher |
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| fatima saifuddin researcher |
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