Sybil was born about 1271 in Ewyas Harold, Hereford, Hertfordshire, England, the daughter of unknown parents.
She died on 21 OCT 1334. The place is not known.
Her husband was Guillaume de Grandson. They were married, but the date and place have not been found. Their only known child was Piers (c1296-1358).
| Event | Date | Details | Source | Multimedia | Notes | ||
|---|---|---|---|---|---|---|---|
| Birth | ABT 1271 |
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| Death | 21 OCT 1334 |
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