Balrothery West (Irish: Baile an Ridire Thiar) is a feudal title of nobility and one of the baronies of Ireland. Originally part of the Lordship of Meath, it was then constituted as part of the old county of Dublin. Today, it lies in the modern county of Fingal. The barony was created by Hugh de Lacy, Lord of Meath as his own feudal barony, held directly from himself in capite. His vassals were commonly called "De Lacy's Barons". At the heart of the barony is the civil parish of Balrothery which is now in the neighbouring barony of Balrothery East. There are eight civil parishes in the barony. Large population centres include Garristown, Naul, Oldtown and Ballyboughil.
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Location
It is bordered by the barony Balrothery East to the west, Nethercross to the south and by the county of Meath to the north and west.
History
It was organised soon after the Norman invasion of Ireland by Hugh de Lacy, Lord of Meath.