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Female Sibyl Marshall Click to view Sibyl Marshall in the family tree

Sibyl's father was Sir William Marshall and her mother was Isabel De Clare.  Her paternal grandfather was John FitzGilbert; her maternal grandparents were Richard FitzGilbert De Clare and Eva , Countess of Ireland Macmurrough. She had a brother and five sisters, named William , 2nd Earl Of Pembroke, Maud , Countess of Norfolk, Margaret, Eva, Isabell , Countess Of Cornwall and Joan.  She died before 1238.


Sibyl's family with William , 5th Earl of Derby De Ferrers

‌Sibyl and William , 5th Earl of Derby were married in a religious ceremony before May 14th, 1219.  They had four daughters named Agnes, Isabel, Joan and Maud , Vicomtesse de Rochechouard.

Sources/Citations
GEDCOM File : 46438.ged, GEDCOM File : rowland2.ged