Sybilla (Sigel) Mitford 
Sybilla (Sigel) was born about 1080 in Castle Mitford, Nhum, England.. Sybilla (Sigel)'s father was Lord John Mitford. She was an only child. Sybilla (Sigel) is no longer alive.General Notes
pg 52, Burke's " A Genealogical History of the Dormant, Abeyant, Forfeited and Extinct Peerages of the British Empire" published 1883
They had a son named William.
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