Family name Dağ (Dag 
, 達 
, Dağ 
) , in all the world, is a common last name. The family name Dağ is habitual in Turkey, where it is a common surname, Sweden, where it is quite a rare surname, and Norway. In absolute terms, it is the most numerous in Turkey, Germany, and China. Very seldom, Dağ is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Dag | Norway, Turkey, India, Sweden, Germany |
| 達 | China |
| Dağ | Saudi Arabia, Turkey, India, France, Germany |
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şevket dağ painter (1876-1944), TR (b. 1876) |
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ekrem dağ Turkish footballer, TR (b. 1980) |
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umut dağ Austrian film director, AT (b. 1982) |
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| halil dağ (b. 1937) |
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| hüseyin dağ Turkish association football player and association football manager, TR (b. 1968) |
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| ahmet dağ researcher (ORCID 0000-0002-1120-3773) |
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| figen dağ researcher |
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| hamza dağ politician, TR (b. 1980) |
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| nurullah dağ researcher |
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| gülten s dağ researcher (ORCID 0000-0003-4887-2214) |
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| ahmet dağ researcher (ORCID 0000-0002-1000-1379) |
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| sevda dağ victim of far-right hate crime in Germany killed in 2016, DE |
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| çağdaş dağ researcher (ORCID 0000-0003-1595-431X) |
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| zuhal dağ researcher (ORCID 0000-0002-3052-5225) |
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| medine yılmaz dağ researcher (ORCID 0000-0001-9409-6282) |
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