(en) William Carrigan, The history and antiquities of the diocese of Ossory, Sealy, Bryers & Walker, (lire en ligne), 96
(en) Sir Bernard Burke, A Genealogical History of the Dormant : Abeyant, Forfeited, and Extinct Peerages of the British Empire, Harrison, (lire en ligne)
(en) George Cokayne, Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct, or Dormant, Londres, George Bell & Sons, (lire en ligne).