William Giffard, Bishop of Winchester

http://fmg.ac/Projects/MedLands/NORMAN%20NOBILITY.htm:

WILLIAM Giffard . Bishop of Winchester. The History of the foundation of St John´s abbey, Colchester names “Rohaisam…soror Willielmi Giffardi episcopi Wintoniæ” as wife of “Ricardi…filius Gilberti comitis”[532]. "…Willelmi Giffardi episcopi…" subscribed a charter dated 14 Sep 1101 under which Henry I King of England donated property to Bath St Peter[533].

Sources:

• [532] Hunt, W. (ed.) (1893) Two Chartularies of the Priory of St Peter at Bath (London) ("Bath St Peter") 42, p. 46.
• [533] Willelmi Gemmetencis Historiæ (Du Chesne, 1619), Liber VIII, XXXVII, p. 312.