Isabelle was born about 1220 in Thetford, Norfolk, England, the daughter of unknown parents.
She died in 1239. The place is not known.
Her husband was Gilbert de Lacy. They were married, but the date and place have not been found. Their only known child was Mahaut (?-1303).
| Event | Date | Details | Source | Multimedia | Notes | ||
|---|---|---|---|---|---|---|---|
| Birth | ABT 1220 |
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| Death | 1239 |
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