Last name Ongun (Ongun 
) , across the world, is quite a common surname. The surname Ongun is habitual in Turkey, where it is quite a rare surname, North Macedonia, where it is a rare surname, and Austria. Measured by absolute frequency, it is the most numerous in Turkey, Germany, and the United Kingdom. Much less frequently, Ongun is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ongun | Germany, United States, United Kingdom, Japan, Turkey |
| ahmet hamdi ongun Turkish politician, TR (b. 1894) |
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murat ongun Turkish journalist, TR (b. 1975) |
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| i̇pek ongun Turkish writer, TR (b. 1942) |
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| tarık ongun Turkish association football referee, TR (b. 1973) |
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| aydan ongun researcher |
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| ongun mehmet saka researcher |
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| salim ongun researcher |
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| sakir ongun researcher |
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| nedim ongun researcher (ORCID 0000-0003-1694-5933) |
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| merve zeyrek ongun researcher (ORCID 0000-0002-2874-8024) |
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