After the Norman conquest the manor of Debden was granted to Ralph Peverel, but reverted to the crown after Peverel's grandson, William Peverel the Younger, poisoned the Earl of Chester.
Following William Peverel the Younger's accusations of treason, the family's lands in the Peak District were seized by the crown and granted by King Henry II to his son, John (later John, King of England).
William married Adelina of Lancaster, who bore him a daughter Adeliza (or Adelaide) (b.1075), and a son, William Peverel the Younger, born circa 1080, following the death of whose first wife married secondly Avice de Lancaster, daughter of Roger of Poitou, Earl of Lancaster.
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Stephen welcomed Ranulf’s support but some of the king's supporters, (especially William de Clerfeith, Gilbert de Gant, Alan, 1st Earl of Richmond, William Peverel the Younger, William d'Aubigny, 1st Earl of Arundel and John, Count of Eu), did not.