Jan was the son of Gottfried von Heinsberg and Mechthild van Loon. The date and place of his birth have not been found.
He died in 1334. The place is not known.
His wife was Katharina von Voorne-Seeland, who he married in ABT 1324. The place has not been found. Their two known children were Heinrich (?-1354) and Godfried II (?-1395).
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Jan I van Loon-Heinsberg |
Gottfried von Heinsberg |
Dietrich II von Heinsberg |
Heinrich I von Sponheim |
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Agnes von Heinsberg-Falkenburg |
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Johanna van Leuven-Gaesbeek |
Godefroy de Brabant |
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Marie van Oudenaarde |
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Mechthild van Loon |
Arnold van Loon-Chiny |
Jan I (XII) van Loon-Chiny |
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Mechthild van Gulik |
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Margaretha van Vianden |
Fillips I van Vianden |
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Maria van Perwijs |
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Death | 1334 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | heer van kasteel Dalenbroek en Heinsberg |