Clementia was born about 1400, the daughter of Gerrit III van Heemskerck and Margaretha van Cralingen. The place is not known.
She died after 29 AUG 1466. The place is not known.
Her husband was Gijsbrecht van Vianen, who she married on 25 MAY 1429. The place has not been found. Their only known child was Maria Petronella (?-<1465).
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Clementia van Heemskerck |
Gerrit III van Heemskerck |
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Gillis van Cralingen |
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Meyne van Swieten |
Dirk van Swieten |
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Isabelle van Borsselen |
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Birth | ABT 1400 |
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| Death | AFT 29 AUG 1466 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | vrouwe van Heemskerck |