She is married to William de Vescy.
They got married before 1244 at 2nd wife.Source 3
Child(ren):
Agnes de Ferrers | |||||||||||||||||||||||||||||||||||||
< 1244 | |||||||||||||||||||||||||||||||||||||
William de Vescy |
Agnes, daughter of William de Ferrers, 5th Earl of Derby of the 1138 creation. [Burke's Peerage]----------------------------------He [William de Vescy] married, 2ndly, before 1244, Agnes, 1st daughter of William (DE FERRERS), 5th EARL OF DERBY, by his 1st wife, Sibyl, sister and, in her issue, coheir of Anselm, 9th EARL OF PEMBROKE, 3rd daughter of William (MARSHAL), 4th EARL OF PEMBROKE. He died in Gascony, shortly before 7 October 1253, and was buried at Watton Priory, co. York. His widow died 11 May 1290, and was buried in the Greyfriars, at Scarborough. [Complete Peerage XII/2:276-8, (transcribed by Dave Utzinger)]