Last name Zulkarnain (Zulkarnain 
, Зулкарнайн 
) , in the world, is a common family name. The last name Zulkarnain is characteristic of South-eastern Asia, particularly Malaysia, where it is quite a common surname, Indonesia, and Brunei. Not in comparison with a country's population, it is the most numerous in Indonesia, Malaysia, and Bangladesh. Also, Zulkarnain is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Zulkarnain | Singapore, Bangladesh, Mauritania, Malaysia, Indonesia |
| Зулкарнайн | Kazakhstan |
Zulkarnaen, Zülkarneyn, Зулкарнаин, Зулькарнаин, Зулькарнайн, and জুলকারনাইন
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tengku zulkarnain Indonesian Muslim preacher (1963-2021), ID (b. 1963) |
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| alex leo zulkarnain Indonesian journalist, ID (b. 1935) |
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zulkarnain malik Singaporean footballer, SG (b. 1992) |
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| zulkarnain damanik Indonesian politician (born 1947 in P. Siantar), ID (b. 1947) |
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| raja iskandar zulkarnain Raja Di-Hilir of Perak (b. 1955) |
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| zulkarnain kamsya Indonesian politician (born 1958), ID (b. 1958) |
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| zulkarnain alfath Indonesian politician (born 1966), ID (b. 1966) |
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| herri zulkarnain Indonesian politician (born 1968 in Medan), ID (b. 1968) |
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| asminan mirza zulkarnain ID (b. 1958) |
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| achmad zulkarnain Indonesian politician (born 1969), ID (b. 1969) |
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| zulkarnain adinegara (b. 1961) |
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| afrizal zulkarnain Indonesian politician (born 1972), ID (b. 1972) |
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| ismail zulkarnain Indonesian politician (born 1972), ID (b. 1972) |
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| hanan zulkarnain ID (b. 1963) |
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| muchammad zulkarnain ID (b. 1967) |
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