O'Cleary's, the, Ch. III n.[24]
O'Clerys, or O'Clearys, antiquarians of Ulster, [154], [264]; poets, [524], [573]
O'Clery, Lughaidh, poet and historian, [516], [564] ff.
O'Clery, Michael, Book of Genealogies, [68]; poem copied by, [170]; Féiliré, [231], [239]; on the dispersion of the old books, [266]; lives of the saints, [406]; Book of Invasions, see [sub voce]; his life and works, [573-580]
O'Clery, "Adventures of Edmund," [597]
O'Clery, Conary, [575]; Peregrine, one of the Four Masters, [577]
O'Coffeys, the, [524]
O'Coffey, Malachy, poet, [474]
O'Conors of Connacht, the, [33], [60], [64], [204], [206], [452], [515], [527], [545]
O'Conors of Belinagare, poem to their house, [545] ff.