De Cíomhsóg, De Ciúmhsóg

de CÍOMHSÓG, de CIÚMHSÓG—XI—de Kisshok, de Keusaac, de Cusaak, de Cusack, Cusack, etc.; Norman 'de Cusak,' i.e., of Cussac in France. This family came to Ireland at the time of the Anglo-Norman invasion and settled in Meath and other parts of Leinster. They were one of the most distinguished families of the Pale and many of them filled high judicial posts under the Anglo-Irish government. In the wars and confiscations of the 17th century they lost their property and were dispersed. The name is now more common in Munster than in Leinster.

Alphabetical Index to Irish Surnames