Ó Seanacháin

Rev Patrick Woulfe
1923

Ó SEANACHÁIN—IO Sheanaghaine, O Shanahan, Shanaghan, Shanahan, Shanihan, Shanan, Shannon, &c.; 'descendant of Seanachán' (diminutive of seanach, old, wise); the name of a Dalcassian family who were ciefs of Ui Ronghaile, in the east of Thomond, until the year 1318, when they were expelled by Torlough O'Brien and the MacNamaras. They settled at first in Co. Waterford, but have long been scattered through Munster. See also Ó Sionacháin which is a Westmeath form of the name.

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