Cognomen Maas (Maas 
, 马斯 
, マース 
) , in the world, is a common last name. The cognomen Maas is characteristic of Western Europe, particularly Netherlands, where it is quite a common surname, Luxembourg, and Germany (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in Netherlands, Germany, and the United States. Much less frequently, Maas is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Maas | Brazil, Netherlands, United States, Mexico, Germany |
| 马斯 | China |
| マース | Japan |
| Маас | Ukraine, Russia, Kazakhstan, Belarus |
| nikolaus maas DE (b. 1585) |
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| wilhelmus maas NL (b. 1588) |
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| nikolaus maas DE (b. 1610) |
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| johann maas DE (b. 1643) |
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| jan maas Dutch artist, 1655-1690, NL (b. 1655) |
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| dirk maas Dutch painter (1659-1717), NL (b. 1659) |
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| johann nikolaus maas (1664-1721), DE (b. 1664) |
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| adriana maas Dutch actress, NL (b. 1702) |
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| franc maas SI (b. 1696) |
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| johann georg maas DE (b. 1702) |
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| godfried arnold maas 1700-1799; Théologien (b. 1734) |
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| johann georg maas (1744-1800) (b. 1744) |
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johann adam maas DE (b. 1784) |
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| henriette maas 1781 - 1845 (b. 1781) |
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| wilhelmine maas DE (b. 1786) |
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