Gaucher I de Châtillon-sur-Marne, Lord of Châtillon-sur-Marne, was born circa 1063 in Châtillon-sur-Marne, Île-de-France, France to Guy I de Châtillon-sur-Marne (c1043-1089) and Ermengarde de Choisy and died 1096 of unspecified causes. He married Mahaut de Louvain (c1060-1112) .
Children
| Name | Birth | Death | Joined with |
| Elisabeth de Châtillon-sur-Marne (c1080-c1127) | 1080 Châtillon-sur-Marne, Île-de-France, France | 1127 | Thibaut II de Crépy (1075-1140) |
| Henri I de Châtillon-sur-Marne (c1080-1126) | 1080 Châtillon-sur-Marne, Île-de-France, France | 1126 | Ermengarde de Montjay (1090-) Elisabeth de Crépy |
| Hugues de Châtillon-sur-Marne | |||
Footnotes (including sources)
| ‡ General |
| Ω Birth |
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