Cassidy Clan

Cassidy - Ó Cassidy - Ó Caiside is an ancient Irish name. In the United States, many Cassidy variations exist, including Cassity, Cassedy and Casada.

All Cassidys originate from County Fermanagh, Northern Ireland, where for centuries they were prominent in the arts and fields of medicine and religion. Like other professional families, over time they moved out to other parts of Ulster province and all of Ireland.

The origin of Ui Caiside, the Cassidys, remains unknown. There is a dispute as to whether they belonged to the Fir Manaigh, the first Celtic settlers of County Fermanagh, or migrated to the area in the sixth century A.D. during the time of St. Molaise who founded the monastery at Devenish Island. Ui Caiside was closely linked to the monastery and had access to its school at a time when education was denied to most.

In his analysis of the family, Father P.O. Gallachair, a historian of the region, states, "Soon the Ui Caiside name was renowned, but unlike most ancient Irish families their fame was never won in mere physical feats of arms, in blood and tears. Theirs was a higher, more noble fame. They were men of peace, culture and scholarship."

Cassidy Clan Website

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