The Clan-ua-Deagha (O' Dea) were also called Degadians and Ernans, from two of their distinguished ancestors; they were celebrated Chiefs in Munster, but were originally descended, as already shown, from the Heremonians of Ulster.

Of this Clan the principal families in Munster (Dysert, Clare) were --

  • O'Falvey, hereditary admirals of Desmond
  • O'Connell, of Kerry, Limerick, and Clare
  • O'Donegan
  • O'Fihilly
  • O'Flynn
  • O'Shee or O'Shea
  • O'Baisan or O'Basken
  • O'Donnell of the county Clare
  • etc.