| 1. | Margaret De Clare (daughter of Gilbert De Clare and Joan Plantagenet). Family/Spouse: Piers De Gaveston. [Group Sheet] [Family Chart] Children: |
| 2. | Gilbert De Clare Gilbert married Joan Plantagenet. [Group Sheet] [Family Chart] |
| 3. | Joan Plantagenet (daughter of Edward I of England and Eleanor of Castile).
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| 6. | Edward I of England died in 1307. Edward married Eleanor of Castile. [Group Sheet] [Family Chart] |
| 7. | Eleanor of Castile
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