Mechtild was the daughter of Engelbert I von der Marck and Elisabeth van Valkenburg. The date and place of her birth have not been found.
Her husband was Florenz Berthout. They were married, but the date and place have not been found. They had no known children.
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Engelbert I von der Marck |
Adolf I (IV) von der Marck-Altena |
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Ermengarde van Gelre |
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Elisabeth van Valkenburg |
Dietrich II von Heinsberg-Valkenburg |
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Bertha van Limburg-Monschau |
Walram I von Limburg |
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Élisabeth de Bar-Mousson |