A manuscript history of the Lacy family names “Robertum Lacy” as son of “Ilberto de Lacy” and his wife “Hauisia”, adding that he founded “monasterium apud Pontefractum”, died during the reign of King William II (incorrect), and was buried at Pontefract. The Liber Vitæ of Durham names "Ilbertus de Laceio, Hathewis sua uxor, Rodbertus et Hugo filii eorum". “Rodbertus de Laceio” confirmed the donation by “pater meus Hilbertus” to Selby Abbey, for the soul of “fratris mei Hugonis”, by undated charter. “Robertus de Laceio” founded Pontefract Priory, for the soul of “Hylberti patris mei et Hawisiæ matris meæ”, by undated charter, dateable to the reign of King William II, witnessed by “W. Peverel…”. A writ addressed to Robert Bishop of Lincoln and Osbert Sheriff of Lincolnshire, dated to [1095/1100], sanctioned an exchange of lands between "Ur de Abet" and "Rotb de Laceio de Ingoluesmaera", witnessed by "R. fil Haim". "Robertus de Lacy" granted "Magnam Merlay…et Tuisleton…et…in Cliderhou" to "Radulpho le Rus" by charter dated 23 Nov 1102. Henry I King of England notified Thomas Archbishop of York and Robert de Lacy of a grant of lands to Robert Bishop of Lincoln, undated but dated to [1108/13].
Robert married Matilda, daughter of ---. “Henricus de Lasci” donated property to Pontefract Priory, for the souls of “patris mei Roberti de Lasci et Matilildis matris meæ”, by undated charter. A manuscript history of the Lacy family records that Ilbert de Lacy was buried “ad sinistrum cornu altaris sancti Benedicti” next to his mother. “...Matildis de Lasci...” witnessed the charter dated to [1147] under which [her son] “H. de Laceio” confirmed the donation to Pontefract made by “domina Aliz uxor Rogerii de Molbrai”.
He was dead by 1129 when his sister Aubreye was described as sister of [his son] Ilbert, not as Robert’s daughter. 1
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