A manuscript which narrates the descents of the founders of Lanthony Abbey names “Hugo…et Walterus frater eius” as the sons of “Gilbertus de Lacy”, adding that Hugh died childless. This is contradicted by the Chronicle of Tintern Abbey, Monmouthshire which records that "Gilbertus de Lacy" had a son "Hugonem" who had "filium Walterum". "…Hugoni de Lacy…" subscribed the charter dated [1172/78] under which Henry II King of England confirmed the freedoms of the city of Rouen. “Hugo de Laci et Roes. uxor mea et Robertus filius meus” donated revenue to Monmouth Priory by undated charter witnessed by "Gilberto de Monemue…Roberto de Monemue…". The Annals of Tigernach (Continuation) record that “the son of the Empress went with Hugo de Lacy from Dublin to Fore and…burnt the town” in 1172. The Annals of Tigernach (Continuation) record that “three fleets of Englishmen arrived in Ireland” in 1177, those of “Hugo de Lacy…William Fitz Audeline and…Philip de Breusa (Pilip de Preis)”, adding that Hugh´s went to Dublin.
Lord of Meath. The Annals of Ulster record the death in 1186 of "Ugo de Lacy…killed by O´Miadhaigh of Tebtha”. 1
One of the Anglo-Norman justiciars of Ireland who went to Ireland with England’s King Henry II in 1171.
Hugh de Lacy was granted (c. March 1172) the lordship of Meath for the service of 50 knights and was left as constable of Dublin and justiciar when Henry returned to England in April 1172. Hugh de Lacy returned to England later in the same year; in 1173 he fought for Henry in Normandy, defending Verneuil. He was appointed to succeed William Fitz Audlin as procurator-general of Ireland in 1177 but was removed from office in May 1181, perhaps because he had married a daughter of Roderic, king of Connaught, without seeking Henry’s permission. Apparently restored during the winter of 1181–82, he was finally suspended from office in 1184. Henry’s son John, who had been created lord of Ireland in 1177, visited Ireland in 1185 and subsequently complained that Hugh de Lacy had intrigued against him.
According to Giraldus Cambrensis, Hugh de Lacy was an able and resolute governor but physically unprepossessing, swarthy, short, and ill-proportioned. He built many castles in his territory; the construction of one, at Durrow, had involved the demolition of an ancient and venerated monastery. While inspecting the building on July 25, 1186, Hugh de Lacy was decapitated by an assassin. His son Walter de Lacy (d. 1241) became 2nd Lord of Meath; a younger son, Hugh de Lacy (d. c. 1242), became 1st Earl of Ulster (1205). 2