Last name Langelaan (Langelaan 
) , in the world, is a rare surname. The cognomen Langelaan is habitual in Western Europe, particularly Netherlands, where it is quite a rare surname, Austria, where it is a rare surname, and Switzerland. Not in comparison with a country's population, the name is most common in Netherlands, Canada, and Australia. Much less frequently, Langelaan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Langelaan | Austria, Australia, Switzerland, Canada, Netherlands |
| hendrik langelaan NL (b. 1799) |
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| henriette maria langelaan (b. 1821) |
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| jacob willem langelaan (b. 1871) |
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| george langelaan UK writer, FR (b. 1908) |
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| james s. langelaan (b. 1927) |
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| maaike langelaan researcher |
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| jack w langelaan researcher (ORCID 0000-0002-0154-1680) |
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| jacob willem langelaan Ph.D. Stanford University 2006 |
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| david n langelaan researcher |
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| margot langelaan |
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