Question: Who is John De Ferrers, 1St Baron Ferrers Of Chartley's paternal grandfather?
Sentence (from "Robert de Ferrers, 6th Earl of Derby"): He was born at Tutbury Castle in Staffordshire, England, the son of William de Ferrers, 5th Earl of Derby, by his second wife Margaret de Quincy (born 1218), a daughter of Roger de Quincy, 2nd Earl of Winchester and Helen of Galloway.
Relevant evidence: Yes