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County Louth

Contae Lú · Leinster
Ireland's smallest county — but the birthplace of Cú Chulainn, home to Drogheda, and gateway between Ulster and Leinster

Common Surnames from County Louth

The most frequent family names with roots in County Louth — names that spread through Ireland and the Irish diaspora:

Bellew Taaffe Callan Hanratty McArdle Byrne Murphy Kelly

History & Heritage

Louth is Ireland's smallest county, but punches far above its size in history. The Cooley Peninsula — the setting of the ancient Irish epic the Táin Bó Cúailnge — was home to the legendary warrior Cú Chulainn, the Irish Achilles. The Táin tells of the war between Connacht and Ulster over the Brown Bull of Cooley; Louth is the terrain where that story plays out.

Drogheda, Louth's largest town, was the site of one of the most notorious events in Irish history: Oliver Cromwell's massacre of the town's garrison and civilians in 1649. Several thousand people were killed. The event scarred Irish collective memory and shaped Catholic Irish-Protestant British relations for generations.

Monasterbice, in north Louth, holds two of the finest high crosses in Ireland — the Cross of Muiredach and the West Cross — dating from the ninth and tenth centuries. The circular tower alongside them is among the best preserved in Ireland.

The County Louth Diaspora in America

Louth's emigrants, like those from across Ulster's border counties, tended to go north to Ulster and then across to Scotland and America. The county's Norman families — Bellew, Taaffe — left traces across the Catholic gentry of Maryland and Pennsylvania.

Stay Connected to County Louth

Love Ireland covers the Cooley Peninsula, the Táin Trail, Drogheda's complicated history, and Monasterbice's extraordinary stone crosses. The smallest county has an outsized amount to explore.

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Researching Your County Louth Ancestry

If your family came from County Louth, here's where to start your research:

Notable People from County Louth

Related Irish Surname Guides

Common County Louth surnames with dedicated pages on this site:

Byrne Murphy Kelly