Cognomen Keustermans (Keustermans 
) , around the world, is a rare last name. The last name Keustermans is habitual in Western Europe, particularly Belgium, where it is quite a rare surname, Netherlands, where it is a rare surname, and France, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Keustermans | Netherlands, Belgium, France, United Kingdom, South Africa |
| jan alfons keustermans Belgian sculptor, BE (b. 1940) |
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| lodewijk keustermans BE (b. 1930) |
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| william keustermans researcher (ORCID 0000-0001-6285-2960) |
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