Around the world, Theunis (Theunis 
, Тейнис) is quite a common male forename. The forename Theunis is habitual in South Africa, where it is quite a common masculine name, Netherlands, where it is a rare boy's name, and Germany, where it is a very rare masculine name. Very seldom, Theunis is the last name as well as the forename.
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| Theunis | Belgium, France, South Africa, Namibia, Netherlands |
| theunis wypart painter on glass in the prince-bishopric of Liège (16th century), BE (b. 1550) |
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| theunis claesz. N. Netherlands painter (1592–1636), NL (b. 1592) |
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| theunis jacobsz lootsman NL (b. 1607) |
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| theunis haakma NL (b. 1709) |
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theunis heukels Dutch politician (1880-1953), NL (b. 1880) |
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| theunis wiersma Dutch Righteous Among the Nations, NL (b. 1888) |
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| theunis heeg Dutch politician (1904-1992), NL (b. 1904) |
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theunis piersma Dutch biologist and university professor, NL (b. 1958) |
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| theunis boonstra Dutch Righteous Among the Nations, NL (b. 1909) |
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| theunis eintes teunissen NL (b. 1901) |
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| theunis willem de jongh former Governor of the South African Reserve Bank, ZA (b. 1913) |
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| theunis c.c. lombard South African poet, ZA (b. 1923) |
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| theunis theodorus South African poet and writer, ZA (b. 1924) |
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| theunis jonck South African weightlifter, ZA (b. 1926) |
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| theunis van schalkwyk boxer (1929-2005), ZA (b. 1929) |
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