• Born: Kendal, Westmorland, England
• Married: Abt 1154
• Died: After 1166

  Research Notes:

An undated manuscript relating to Cockersand Abbey, Lancashire records that “Gilbertus [genuit] Will; qui quidem Willielmus fecit se vocari Willielmum de Lancaster...baronem de Kendale”. “Willielmus filius Ranulphi” confirmed the foundation of St Bee’s priory, Cumberland by undated charter, dated to [1105/20], which refers to donations by “Willielmus filius Gilberti de Lancastria”. "Willelmus filius Ranulfi" confirmed the donation of land "de Swartahof" donated by "Willelmus filius Gilberti de Lancastre" to St Bees by undated charter. An undated manuscript relating to Cockersand Abbey, Lancashire names “Willielmum de Lancaster” as son of ”Gilbertus”. A charter of King Henry II confirmed the donation to Furness by “Willilemum filium Gilberti” also named “primus Willielmum de Lancaster, baronem de Kendale, qui prius vocabatur de Tailboys”. "Willelmus de Lancastre" donated property to Leicester, St Mary de Pré, with the consent of "Willelmi filii mei et hæredis et Gundredæ uxoris meæ", by charter dated to [1153/56]. "Willelmus de Lancastre" donated pasture rights in "feodum meum in Lonisdale et in Aumundernesse" to Leicester, St Mary de Pré, with the consent of "Willelmi filii mei et heredis et Gundree uxoris mee", for the souls of "…Gilberti patris mei et Godithe matris mee et Jordani filii mei et Margarete filia Comitisse", by charter dated to [1156/60], witnessed by "Willelmo filio meo et herede, Gundr fil Comitisse…".

Lord of Kendale and Lonsdale in Westmoreland in 1166. A charter of King Henry II records that “primus Willielmum de Lancaster, baronem de Kendale, qui prius vocabatur de Tailboys” married “Gundredam comitissam Warwic”. ¹