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Family William de FERRERS 7th Earl of DERBY & Sibyl MARSHALL Click to view William de FERRERS 7th Earl of DERBY & Sibyl MARSHALL in the family tree

William de and Sibyl were married in a religious ceremony before May 14th, 1219 in Of, Pembroke, Pembrokeshire, Wales.  They had a son and seven daughters, named John De, Maud (Matilda) De, Agnes De, Isabel de, Joan De, Sibyl De, Agatha De and Eleanor De.

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