Cognomen Zwaag (Zwaag 
) , worldwide, is quite a rare last name. The family name Zwaag is characteristic of Netherlands, where it is quite a rare surname, Finland, where it is a rare surname, and New Zealand. In absolute terms, the name is most common in Netherlands, Germany, and the United States. Much less frequently, Zwaag is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Zwaag | Germany, Australia, Netherlands, France, United States |
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geert van der zwaag Dutch politician (1858-1923), NL (b. 1858) |
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| w.c. van der zwaag (b. 1811) |
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| frederika van der zwaag NL (b. 1901) |
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| jan van der zwaag NL (b. 1905) |
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| geert lourens van der zwaag (b. 1913) |
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| geart van der zwaag Dutch poet (1924-1989), NL (b. 1924) |
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| joop van der zwaag Dutch politician (1934-2003), NL (b. 1934) |
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| w. van der zwaag (b. 1926) |
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| marijke van der zwaag NL (b. 1945) |
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| klaas van der zwaag Dutch journalist and theologian, NL (b. 1955) |
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| rob van der zwaag Dutch politician, NL (b. 1962) |
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| s. van der zwaag (b. 1955) |
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| peter van der zwaag (b. 1962) |
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| gezina van der zwaag Dutch singer, NL (b. 1976) |
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| s. van der zwaag Ph.D. |
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