Fermoy was the territory held by the Roches, a Norman family.

From JCHAS:

Fermoy. Feara-muighe-feine, "men of the grassy plain,", afterwards shortened to Fearamuighe, anglicized to its present name. In the seventh century, Cuanna, king of this territory, was famed throughout Ireland for his hospitality. He was descended from a famous Druid, Magh Rath, third century. After the establishment of surnames, the chief of Dubhagan (this district), from Dubhagan, slain in battle about 908, descended of the Druid-king, took the name O'Dugan. St. Molagga, to whom several churches in county Cork are dedicated, was also of this race. In 954 Donogh MacKeeffe, the then chief or petty king, commanded an expedition against the Danes. St. Finnchua founded a religious house here in the beginning of the seventh century. After the Norman invasion the district was granted to Fleming, and by marriage with daughter came to the de Rupes or Roches. Sir Richard de Rupe, lord justice of Ireland 1261, founded an abbey for Cistercians at Fermoy in 1270.

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