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Female Sibyl de Tregoz Click to view Sibyl de Tregoz in the family tree

Sibyl de was born about 1271 in Ewyas Harold, Herefordshire, England.  She died on October 21st, 1334 in Dore Abbey, Sussex, England.

Sibyl de's family with William 1st Baron de Grandison , Sir

‌Sibyl de and William 1st Baron de were married in a religious ceremony about 1286 in Donyatt, Somerset, England.  They had a son and two daughters, named Piers 2nd Baron de, Mabel de and Katherine de.

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