Marguerite de Châteauneuf was born circa 1212 to Hugues IV de Châteauneuf (-1229) and Eléonore de Dreux (1186-aft1248) and died circa 1259 of unspecified causes. She married Hervé III de Léon (c1190-c1240) .
Children
| Name | Birth | Death | Joined with |
| Hervé IV de Léon (c1225-c1290) | 1225 | 1290 | Mathilde de Poissy |
| Alix de Léon (1225-) | |||
| Catherine de Léon | |||
Footnotes (including sources)
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