Moore ~ Ó Mórdha

The Story of the Moore Name

Moore is an anglicized form of the Irish Ó Mórdha, meaning “descendant of Mórdha.” The personal name Mórdha comes from mór, meaning “great,” and carries the sense of someone noble, stately, or distinguished.

The most important Gaelic Moore family became the ruling family of Laois, then known as Leix. Their principal stronghold was Dunamase, whose dramatic ruins still rise above the landscape near Portlaoise. For centuries, the Ó Mórdha resisted English attempts to take control of their territory and became one of the most determined Gaelic families of Leinster.

The family's struggle intensified during the sixteenth century, when the English Crown targeted Laois for plantation. The O'Moores were dispossessed of much of their ancestral territory, and many members of the family were forced from their homeland. Yet the name survived, and the Moore family remained closely connected with Laois and the wider Irish midlands.

There are also other origins for the surname Moore in Ireland, including English, Norman, and other Gaelic families. For someone tracing an Irish Moore family, the county of origin therefore matters greatly. But behind the Gaelic Ó Mórdha lies the story of one of Ireland's great Leinster dynasties—a family whose name still echoes across the landscape of County Laois.