Surname Thielen (Thielen 
) , worldwide, is a common last name. The cognomen Thielen is characteristic of Western Europe, particularly Luxembourg, where it is quite a common surname, Belgium, where it is quite a rare surname, and Germany. In absolute terms, it is commonest in Germany, the United States, and Belgium. Much less frequently, Thielen is the forename as well as the last name.
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| Thielen | United States, France, Belgium, Germany, Netherlands |
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jan philips van thielen Flemish still life painter (1618-1667), BE (b. 1618) |
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| daniel thielen German painter, DE (b. 1623) |
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| maria theresa van thielen Flemish painter (1640-1706), BE (b. 1640) |
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| françoise catharina van thielen (1645-1662), V3, p 105, NL (b. 1645) |
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| anna van thielen BE (b. 1641) |
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| petrus thielen German carpenter and shipyard owner (1743-1821) (b. 1743) |
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frans van der straten van thielen Belgian politician, BE (b. 1794) |
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peter thielen German theologian (1806-1887), DE (b. 1806) |
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| hermann thielen German shipbuilder (1771-1849) (b. 1771) |
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| maximilian friedrich von thielen soldier, geographer, military historian, Romanist (b. 1781) |
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karl von thielen German politician (1832-1906), DE (b. 1832) |
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peter heinrich thielen German composer and organist (1839-1908), DE (b. 1839) |
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| heinrich josef thielen (1832-1898) (b. 1832) |
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| alexander thielen German industrialist and association official (1841-1897), DE (b. 1841) |
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| hermann thielen (b. 1834) |
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