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Family name Joncker (Younker
, Joncker
) , globally, is quite a rare cognomen. The surname Joncker is habitual in Canada, where it is a rare surname, the United States, and Belgium.
| VARIANT | COUNTRY |
|---|---|
| Younker | Canada, Israel, New Zealand, United States, Romania |
| Joncker | Belgium, Canada, France, United States, Germany |