Bertha (de Ferrers)

✓ Bertha, wife of Henry de Ferrieres of Tutbury (I100498): his foundation charter of Tutbury priory is 'pro salute anime patris mei et matris mee et uxoris mee Berte et filiorum meorum Engenulphi W. Roberti'. Mother of Engenulf, William and Robert, 1st Earl of Derby. Added 15 Oct 2026 as the wife missing from F100126. Source: Complete Peerage IV (2nd ed.) pp.191-192, DERBY, and note (c) (pages supplied by Aynsley, 15 Oct 2026) (Cartulary of Tutbury). [DIRECT ANCESTOR OF THE COMPILER: flag added 15 Oct 2026 by walking the tree from Aynsley, so that this marker is reliable and can be searched.]