Oak – Owens

N.B.—The number following each name refers to the number of the principal name under which it will he found in the Alphabetical List.

Oak, 424, 1640.
Oakes, 424, 1640.
Oaks, 424, 1640.
Oates, 1641.
Oats, 1641, 1757.
O’Beirne, 206.
O’Boyle, 143.
O’Brallaghan, 145.
O’Brian, 1642.
O’Brien, 176, 382, 1233, 1642.
O’Brine, 1233.
O’Bryan, 1642.
O’Bryen, 1642.
O’Byrne, 197, 206.
O’Cahan, 214, 663, 1670.
O’Caharney, 975.
O’Caherney, 975.
O’Callaghan, 220, 1643.
O’Callahan, 1643.
O’Carroll, 250.
O’Carthy, 253, 1644.
O’Caughan, 1670.
O’Cloghessy, 1645.
O’Clohessy, 1645.
O’Clussey, 1645.
O’Colter, 343.
O’Connell, 316, 1646.
O’Conner, 320.
O’Connor, 320, 321, 1647.
O’Conor, 320.
O’Cullane, 304.
O’Currobeen, 333.
O’Curry, 339.
Odarian, 494.
O’Dea, 725, 1648.
O’Dermott, 457.
O’Devine, 461, 1650.
O’Dheer, 1657.
O’Diff, 521.
Odlum, 1649.
O’Doherty, 479, 1651.
O’Donnell, 417, 485, 1301, 1652.
O’Donnelly, 485.
O’Donovan, 489, 1653.
O’Doogan, 522.
O’Dooghany, 522.
O’Doolan, 505.
O’Dornan, 495.
O’Doud, 1654.
O’Dougherty, 1651.
O’Dowd, 498, 1654.
O’Driscoll, 513, 943, 1655.
O’Duffy, 521, 1656.
O’Dwyer, 537, 1657.
O’Farrell, 584, 1658.
O’Ferry, 601.
O’Filbin, 1721.
O’Flaherty, 626, 1051, 1659.
O’Flanagan, 628, 1660.
O’Foodhy, 1945.
Ogan, 2070.
O’Gara, 671, 677.
O’Garriga, 1668.
O’Gilbie, 698, 1661.
Ogilby, 1661.
O’Gilvie, 1661.
O’Gorman, 738, 1662.
O’Gowan, 1897.
O’Grady, 746, 1663.
O’Gready, 1663.
O’Hagan, 782, 886, 1664.
O’Haire, 821, 1668.
O’Hallaran, 1665.
O’Halleran, 1665.
O’Halleron, 1665.
O’Halloran, 793, 1665.
O’Hamill, 795.
O’Hanlon, 808, 1666.
O’Hara, 825, 1667.
O’Hare, 821, 1668.
O’Harra, 1667.
O’Hea, 848, 1669.
O’Hear, 821, 1668.
O’Fegan, 1664.
O’Herlihy, 937.
O’Hora, 1667.
O’Hure, 922.
Oins, 1690.
O’Kane, 663, 971, 1670.
O’Keane, 1670.
O’Keefe, 1671.
O’Keeffe, 979, 1671.
O’Kelly, 988, 1672.
O’Keoneen, 961.
O’Kibbon, 695.
O’Kielt, 1896.
O’Kieran, 976.
O’Laverty, 1070.
O’Leary, 1080, 1673.
Olligan, 791.
O’Loughlan, 1674.
O’Loughlin, 1124, 1674.
O’Lyons, 1142, 1675.
O’Malley, 1174, 1175, 1511, 1676.
O’Mara, 1677.
O’Meally, 1175.
O’Mealue, 1676.
O’Mealy, 1676.
O’Meara, 1186, 1503, 1677.
O’Meehon, 1507.
O’Mullane, 1582.
O’Muracha, 1600.
O’Neal, 1678.
O’Neill, 1624, 1678.
Oogan, 2070.
Oolahan, 919.
Oonin, 753.
O’Rafferty, 1760.
Orchard, 1679.
O’Reiley, 1680.
O’Reilly, 1680, 1785.
Organ, 915.
O’Rielly, 1680.
O’Riordan, 1681, 1795.
O’Roarke, 1682.
O’Rorke, 1682, 1820.
O’Rourke, 1682, 1820.
O’Ryan, 1831.
Osborne, 1683.
Osbourne, 1683.
Osburne, 1683.
O’Sevnagh, 1944.
O’Shanesy, 1684.
O’Shaughnessy, 1684, 1863.
O’Shea, 1685, 1864.
O’Shoughnessy, 1684.
O’Sullivan, 1686, 1936.
O’Summachan, 1937.
O’Thina, 632.
O’Toole, 1687, 1972.
Ottley, 1688.
Ougan, 2070.
Oulahan, 919.
Oulihan, 919.
Ounihan, 483.
Ovenden, 1689.
Ovington, 1689.
Owen, 910, 1690.
Owens, 892, 945, 1690.