Cognomen Demirsoy (Demirsoy 
) , in the world, is a rare family name. The cognomen Demirsoy is habitual in Turkey, where it is a rare surname, Austria, and Belgium. In absolute terms, it is commonest in Turkey, Germany, and Austria.
| seyfi demirsoy (b. 1920) |
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onur demirsoy Turkish cartoonist, TR (b. 1981) |
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| ramazan demirsoy (b. 1928) |
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derin demirsoy equestrian from Turkey, TR (b. 1994) |
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| ugur demirsoy researcher (ORCID 0000-0002-5424-7215) |
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| evren odyakmaz demirsoy researcher (ORCID 0000-0002-8120-9548) |
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| ibrahim h demirsoy researcher |
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| esra terzi demirsoy researcher (ORCID 0000-0001-7083-9379) |
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| nilufer demirsoy researcher (ORCID 0000-0002-2647-0807) |
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| utku demirsoy |
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