Jan I van Peteghem, Lord of Cysoing, Lord of Peteghem, was born circa 1120 to Engelbert IV van Peteghem (-1135) and Dochter van Gent (c1095-c1142) and died 1154 of unspecified causes. He married Petronille d'Oisy (c1137-aft1174) .
Children
| Name | Birth | Death | Joined with |
| Jean II de Cysoing | |||
| Johanna van Peteghem | |||
| Elisabeth van Peteghem (c1154-c1201) | 1154 | 1201 | Jean I de Nesle (1153-1214) |
Residences
Footnotes (including sources)
| ‡ General |
| Ω Birth |
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