Map of Ireland - See Portarlington, Laois County
Portarlington, formerly Port Arlington, a town straddling Counties Laois and Offaly (Formerly Queen’s County & King’s County) in Ireland, was once the land of the O’Dempseys and Lea Castle. It is located on the picturesque Barrow River approximately 50 miles southwest of Dublin. See Lea Castle.
The name Dempsey originated in the territory of Clanmalier on the borders of what are now Counties Laois and Offaly. They remained prominent in that area until the Williamite Wars.
During the massacre of Mullaghmast in 1577 many of the Lalors clan were killed by an alliance of the O'Dempseys and English planters.
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