Walter de Lacy, Lord of Meath

Walter de Lacy (c. 1172–1241) was lord of Meath in Ireland. He was also a substantial land owner in Weobley, Herefordshire, in Ludlow, Shropshire, in Ewyas Lacy in the Welsh Marches, and several lands in Normandy. He was the eldest son of Hugh de Lacy, a leading Cambro-Norman baron in the Norman invasion of Ireland.

With his father he built Trim Castle (Irish: 'Caisletheán Bhaile Atha Troim) in Trim, County Meath.

During the revolt of Prince John Lackland, Lord of Ireland, against his brother, King Richard the Lionheart, in 1193-94, Walter joined with John de Courcy to support Richard. Walter apprehended some knights loyal to John along with Peter Pipard, John's justiciar in Ireland. Walter did homage to Richard for his lands in Ireland in 1194, receiving his lordship of Meath. After mounting the throne of England in 1199, John wrote to his justiciar in Ireland to complain that de Courcy and de Lacy had destroyed John's land of Ireland. Walter had made John his enemy.

In 1203, John granted custody of the city of Limerick to Walter's father-in-law, William de Braose, 4th Lord of Bramber. As de Braose was an absentee, Walter served as de Braose's deputy in Limerick.

In 1206-07, Walter became involved in a conflict with Meiler Fitzhenry, Justiciar of Ireland, and Walter's feudal tenants for lands in Meath; Meiler had seized Limerick. King John summoned Walter to appear before him in England in April, 1207. After Walter's brother Hugh de Lacy, 1st Earl of Ulster, had taken Meiler FitzHenry prisoner, John in March, 1208 acquiesced in giving Walter a new charter for his lands in Meath. Upon his return to Ireland later in 1208, Walter may have acted as Justiciar of Ireland in lieu of the deposed Meiler fitz Henry. By this time, John had begun his infamous persecution of Walter's father-in-law, de Braose, who fled to Ireland.

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