- William is linked to his father Nigel and to his daughter Idonea by a Feet of Fines entry:
September 29 — October 27. Westminster. Within one month of S. Michael, 15 Henry III.
Between Idonea daughter of William son of Nigel de Shardelawe, by William le Cruir, her attorney and William de Neutone, by Henry de Saint Piers his attorney, Plaintiffs, and Robert Fitz Ede of Sherdelawe, Tenant.
Grant by Plaintiff Idonea to Tenant, in fee, of 4 oxgangs of
land in Sherdel[awe] (Shardlow), at the yearly rent of 5s. for all service ; and performing the foreign service pertaining to the same.