The O'Tooles, anciently lords of Powerscourt (Feracualan), Fertire, and Imale : with some notices of Feagh Mac Hugh O'Byrne,

Ancestry.com. The O'Tooles, anciently lords of Powerscourt (Feracualan), Fertire, and Imale : with some notices of Feagh Mac Hugh O'Byrne, [database on-line]. Provo, UT: Ancestry.com Operations Inc, 2005.Original data: O'Toole, John.. The O'Tooles, anciently lords of Powerscourt (Feracualan), Fertire, and Imale : with some notices of Feagh Mac Hugh O'Byrne, chief of Clan-Ranelagh. Dublin: A.M. Sullivan, 1869.