County Westmeath (Irish: Contae na hIarmhí) is a county in Ireland. It is part of the Midlands Region and the province of Leinster. It is named after the ancient Kingdom of Meath
Following the Norman invasion of Ireland, the territory of the Kingdom of Meath was subsumed into the Lordship of Meath and granted by King Henry II of England, in his capacity as Lord of Ireland, to Hugh de Lacy in 1172. Following the failure of male heirs, the Lordship was split between de Lacy's great-granddaughters
The western part was awarded to Margery and her husband, John de Verdun while the eastern part, centred on Trim, was awarded to Maud.