Cognomen Valckx (Valckx 
) , worldwide, is a rare surname. The cognomen Valckx is habitual in Belgium, where it is quite a rare surname, Netherlands, and Canada, where it is a very rare surname. Much less frequently, Valckx is the forename as well as the last name.
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| Valckx | Netherlands, Canada, Belgium, Germany, Spain |
| pieter valckx Flemish sculptor (b. 1734) |
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stan valckx Dutch footballer, NL (b. 1963) |
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| petrus valckx born 1920; Belgisch, BE (b. 1920) |
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| catharina valckx NL (b. 1957) |
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| catherine valckx |
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| peter valckx |
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