Family name Groos (Groos 
, 格罗斯 
, Грос 
) , all around the world, is quite a rare last name. The surname Groos is habitual in Estonia, where it is quite a rare surname, Netherlands, and Germany. Not in comparison with a country's population, it most frequently occurs in Germany, Netherlands, and the United States. Much less frequently, Groos is the forename as well as the last name.
| richard groos politician (b. 1301) |
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| gerard de groos (b. 1650) |
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| immanuel groos (b. 1729) |
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wilhelm friedrich groos German politician, DE (b. 1801) |
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eduard groos (b. 1806) |
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| friedrich groos German doctor and philosopher, DE (b. 1768) |
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| georg groos (b. 1762) |
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| karl henrich groos DE (b. 1771) |
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| karl groos (b. 1783) |
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| karl august groos DE (b. 1789) |
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| christian theodor groos (b. 1801) |
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| christian friedrich groos (b. 1801) |
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| emil groos DE (b. 1803) |
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| karl groos DE (b. 1819) |
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| wilhelm gustav groos DE (b. 1824) |
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