Sibyl de Ferrers

~ Sibyl, wife of John de Vipont (his charter names 'Sibille uxoris mee'). Her placement as a daughter of William de Ferrers, Earl of Derby (d.1247, I100493) and Agnes of Chester rests on Prescott (no source cited), so ~. RING 19 Oct 2026 into the Ferrers earls. Source: Medieval Lands (fmg.ac, Cawley), 'English Nobility Medieval 1' (Ferrers, Earls of Derby). [DIRECT ANCESTOR OF THE COMPILER: flag added 19 Oct 2026 by walking the tree from Aynsley, so that this marker is reliable and can be searched.]