Last name Caelen (Caelen 
) , in the world, is a rare cognomen. The surname Caelen is habitual in Western Europe, particularly Belgium, where it is quite a rare surname, Netherlands, where it is a rare surname, and France. Much less frequently, Caelen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Caelen | Belgium, United States, France, Brazil, Netherlands |
| hendrik van caelen BE (b. 1582) |
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florent caelen Belgian long-distance runner, BE (b. 1989) |
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| olivier caelen researcher ORCID ID = 0000-0001-6970-9825 |
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| jean paul caelen (b. 1972) |
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| freddy caelen |
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| caelen dalmer CA (b. 1997) |
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