O’Boyle, [37]

O’Brennan, [247]

O’Brien, Henry, [111]

— Sir Daniel, [113]

O’Byrne, Feagh MacHugh, [92], [97], [161], [176]

— Phelim MacFeagh, [92], [97]

— Hugh MacPhelim, [315], [319], [347], [349]

— clan, [99];

case of the, [176]-[179]

O’Cahan, Donnell, [31]-[33], [58], [62], [145]