Template:R:ga:O'Brien
O'Brien, John (1768) “R:ga:O'Brien”, in Focalóir Gaoidhilge-Sags-Bhearla[1], 2nd edition, Dublin, published 1832
O'Brien, John (1768) “R:ga:O'Brien”, in Focalóir Gaoidhilge-Sags-Bhearla[1], 2nd edition, Dublin, published 1832