Family name Koal (Koal 
, Caulis 
) , in the world, is a common surname. The last name Koal is characteristic of India, where it is quite a rare surname, Germany, where it is a rare surname, and Sudan. Not in comparison with a country's population, it is commonest in India, Germany, and Bangladesh. Much less frequently, Koal is the forename as well as the last name.
| werner koal DE (b. 1939) |
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| tobias koal Dr.-Ing. Brandenburgische Technische Universität Cottbus 2014 |
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| therese koal |
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| hans-peter koal |
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