What is "boylagh"

Boylagh is a historic barony in County Donegal in Ireland. Patrick Weston Joyce said the name Boylagh comes from the territory of the O'Boyles. It was created along with Banagh when the former barony of Boylagh and Banagh was split in 1791 by an Act of the Parliament of Ireland.

Boylagh is bordered by the baronies of Kilmacrenan to the north east, Rapboe South to the east, and Banagh to the south; to the north and west is the Atlantic Ocean.