Saer II de Quincy 1
From Wikipedia - Saer de Quincy, 1st Earl of Winchester :
The family of de Quincy had arrived in England after the Norman Conquest , and took their name from Cuinchy in the Arrondissement of Béthune ; the personal name "Saer" was used by them over several generations. Both names are variously spelled in primary sources and older modern works, the first name being sometimes rendered Saher or Seer, and the surname as Quency or Quenci.
The first recorded Saer de Quincy (known to historians as "Saer I") was lord of the manor of Long Buckby in Northamptonshire in the earlier twelfth century, and second husband of Matilda of St Liz , stepdaughter of King David I of Scotland . This marriage produced two sons, Saer II and Robert de Quincy . It was Robert, the younger son, who was the father of the Saer de Quincy who eventually became Earl of Winchester. By her first husband Robert Fitz Richard , Matilda was also the paternal grandmother of Earl Saer's close ally, Robert Fitzwalter.
Wikipedia.org, Saer de Quincy, 1st Earl of Winchester.