Emma (becoming through her feudal Lord of Bourne, Lincs), elder daughter and coheir of Baldwin Fitz Gilbert/de Clare (brother of 1st Earl of Pembroke of the 1138 creation and son of Gilbert, feudal Lord of Clare, Suffolk and Cardigan, whose father Richard was son of the Count of Brionne, of an illegitimate line of the Dukes of Normandy), by Adeline (daughter of Richard de Rollos, Chamberlain to Henry I, apparently by Godiva, daughter of Hugh d'Envermeu by Turfrida, daughter and heiress of the Mercian Thegn Hereward, who led Anglo-Saxon resistence to William I (The Conqueror) 1071 and who apparently got back his pre-Conquest lands at Witham, Barholm, and Rippingale about the time of the Domesday Survey 1086. [Burke's Peerage]
--------------------------
He [Hugh Wac] married Emma, daughter and coheir of Baldwin FiTZGILBERT, or DE CLARE, by Adeline, daughter of Richard DE ROLLOS (d). She was dead in 1168. He died probably between Michaelmas 1175 and Michaelmas 1176. [Complete Peerage XII/2:295-6, (transcribed by Dave Utzinger)]
(d) . . . It was the marriage of Hugh Wac to Emma which brought her mother's lordship of Bourne to the Wakes and which led them later to adopt Hereward the Outlaw as their ancestor and to give him their own name as "the Wake".