O'KENNEDY, More of Ormonde |
O'KEVER, Ralph |
| O'LEARY, Helen | B. Private |
| O'LEARY, John | B. Private |
| O'LEARY, Michael | B. Private |
| O'LEARY, Niall | B. Private |
| O'LEARY, Shane | B. Private |
| O'LEARY, Thereasa | B. Private |
| O'LOCHLIN, Saibh |
| O'MAIL, Aed Dibchine macSenaig Dibig |
| O'MAIL, Cellach Cualann macGerthide | D. 715
| O'MAIL, Crimthann macAedo Dibchine | D. 633
| O'MAIL, Dicuil Dana macRonain Crach |
| O'MAIL, Fiannamail macMael Tuile | D. 680
| O'MAIL, Gerthide macDucuil Dana |
| |