Cognomen Wiltjer (Wiltjer 
) , in the entire world, is a rare family name. The family name Wiltjer is habitual in Netherlands, where it is quite a rare surname, the United States, where it is a very rare surname, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Wiltjer | United Kingdom, United States, Canada, Brazil, Netherlands |
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kyle wiltjer American–Canadian basketball player, US (b. 1992) |
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| greg wiltjer Canadian basketball player, CA (b. 1960) |
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| hanneke wiltjer researcher (ORCID 0000-0001-9765-9765) |
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