Orbsen, [48]
Orders of Saints, the three, [192-3]
O'Reillys, the, [33], [477], [527]
O'Reilly, Father, O S F., [567]
O'Reilly's "Irish writers," [221], [429], [433], [469], [470] ff., [524], [536], [564], [597]
O'Regans, the, [35]
Oriel, Book of, [59]
Oriel, i.e., Monaghan, [67]
Ormond, Duke of, born 1607, [614-15]
Orthography of the Irish Latinists, [185]