Hawise de Vitre Countess of Derby

✓ Hawise, 'da. of Andre, Seigneur de Vitre in Brittany, by Agnes, da. of Robert, Count of Mortain'; wife of Robert de Ferrieres, 1st Earl of Derby (one of the commanders at the battle of the Standard, cr. Earl by Stephen shortly afterwards, d. 1139): CP IV 'Derby' p.191. Mother of Robert, 2nd Earl (I100496). Through her mother she is a granddaughter of Robert, Count of Mortain, half-brother of the Conqueror (I99991, already in the tree) - RING 27 Oct 2026. The Vitre barons already in this tree (Robert III de Vitre, I100843) are of the same house but the connecting generations are not wired (Medieval Lands, not read today). Source: Complete Peerage 2nd ed. vol. IV (1916), 'Derby' pp.191-194 and Appendix I 'Peverel of Nottingham' pp.761-767 (archive.org completepeerageo04coka), read 27 Oct 2026. [DIRECT ANCESTOR OF THE COMPILER: flag added 27 Oct 2026 by walking the tree from Aynsley, so that this marker is reliable and can be searched.]