Tirial
TIRIAL—VIII—Torel, Turritt, Tyrel, Tirrell, Tyrrell; 'son of Tyrel' or 'Thurold' (corrupt for Anglo-Saxon Thurwald, Norse Thorvaldr). This family, which is of Norman origin, came to England with William the Conqueror. At the time of the Anglo-Norman invasion, Hugh Tyrrell received from Hugh de Lacy the lordship of Castleknock; and his descendants were styled Barons of Castleknock until the line became extinct in 1385. In Co. Westmeath, the Tyrrells possessed the barony of Fertullagh down to the 17th century. Captain Richard Tyrrell was a celebrated commander in the Elizabethan wars in Ireland. Also Trial.
Alphabetical Index to Irish Surnames