Surname Işik (Işik 
) , worldwide, is a widespread cognomen. The last name Işik is habitual in Turkey, where it is a common surname, Saudi Arabia, where it is a very rare surname, and Germany. Very seldom, Işik is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Işik | Germany, Saudi Arabia, United States, China, Turkey |
| mustafa işik researcher |
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| erkan işik researcher (ORCID 0000-0002-5210-830X) |
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| kevser işik researcher (ORCID 0000-0001-9081-7660) |
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| hakan işik researcher |
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| gülşah çikrikçi işik researcher |
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| esme işik researcher |
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| erkan işik researcher (ORCID 0000-0002-0373-120X) |
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| tuba işik DE (b. 1981) |
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