| 1 | I1946 | O'Brien, Lafracoth
Father: O'Brien, Muircertach Mother: (unknown), Dubhchobhleigh | LAFRACOTH,O'BRIEN | O'BRIEN,LAFRACOTH | | 945 | | 1 | | 916 | 29 | | 11 March 2022 - 3:33:45pm | F | YES | YES | |
| 2 | I1947 | O'Brien, Muircertach
Father: O'Brien, Toirdelbach
| MUIRCERTACH,O'BRIEN | O'BRIEN,MUIRCERTACH | | 996 | | 1 | | 940 | 56 | | 10 March 2022 - 5:00:35pm | M | YES | YES | |
| 3 | I2849 | O'Brien, Tadc
Father: Boru, Brian
| TADC,O'BRIEN | O'BRIEN,TADC | | | | 1 | | | | | 10 March 2022 - 5:11:53pm | M | YES | YES | |
| 4 | I2819 | O'Brien, Toirdelbach
Father: O'Brien, Tadc
| TOIRDELBACH,O'BRIEN | O'BRIEN,TOIRDELBACH | | 1016 | | 1 | | 939 | 77 | | 10 March 2022 - 5:09:51pm | M | YES | YES | |
| 5 | I1693 | O'Dea, Katherine
| KATHERINE,O'DEA | O'DEA,KATHERINE | | | | 1 | | | | | | F | YES | YES | R |
| 6 | I0874 | O'Meara, Bridget Mary
Father: O'Meara, John Mother: Griffen, Elizabeth | BRIDGET MARY,O'MEARA | O'MEARA,BRIDGET MARY | | 188 | | 7 | | 112 | 76 | | | F | YES | YES | |
| 7 | I1416 | O'Meara, Eugene
Father: O'Meara, John Mother: Griffen, Elizabeth | EUGENE,O'MEARA | O'MEARA,EUGENE | | | | 0 | | | | | | M | YES | YES | |
| 8 | I1417 | O'Meara, John
Father: O'Meara, John Mother: Griffen, Elizabeth | JOHN,O'MEARA | O'MEARA,JOHN | | | | 0 | | | | | | M | YES | YES | |
| 9 | I0875 | O'Meara, John
| JOHN,O'MEARA | O'MEARA,JOHN | | 221 | | 10 | | 138 | 83 | | | M | YES | YES | R |
| 10 | I1415 | O'Meara, Kate
Father: O'Meara, John Mother: Griffen, Elizabeth | KATE,O'MEARA | O'MEARA,KATE | | | | 0 | | | | | | U | YES | YES | |
| 11 | I1418 | O'Meara, Lizzie
Father: O'Meara, John Mother: Griffen, Elizabeth | LIZZIE,O'MEARA | O'MEARA,LIZZIE | | | | 0 | | | | | | F | YES | YES | |
| 12 | I1420 | O'Meara, Matthew
Father: O'Meara, John Mother: Griffen, Elizabeth | MATTHEW,O'MEARA | O'MEARA,MATTHEW | | 172 | | 0 | | | | | | M | YES | YES | |
| 13 | I1419 | O'Meara, Maurice
Father: O'Meara, John Mother: Griffen, Elizabeth | MAURICE,O'MEARA | O'MEARA,MAURICE | | | | 0 | | | | | | M | YES | YES | |
| 14 | I1422 | O'Meara, Nellie
Father: O'Meara, John Mother: Griffen, Elizabeth | NELLIE,O'MEARA | O'MEARA,NELLIE | | | | 0 | | | | | | F | YES | YES | |
| 15 | I1421 | O'Meara, Patrick
Father: O'Meara, John Mother: Griffen, Elizabeth | PATRICK,O'MEARA | O'MEARA,PATRICK | | | | 0 | | | | | | M | YES | YES | |
| 16 | I1414 | O'Meara, Peter
Father: O'Meara, John Mother: Griffen, Elizabeth | PETER,O'MEARA | O'MEARA,PETER | | | | 0 | | | | | | M | YES | YES | |
| 17 | I0633 | Olsen, Jens Eugene
| JENS EUGENE,OLSEN | OLSEN,JENS EUGENE | | 130 | | 4 | | 36 | 93 | | 20 May 2008 - 12:11:32pm | M | YES | Y100 | R |
| 18 | I1948 | Osborn, Cynrik Ap
Father: FitzGerald, Osburn Wyddel
| CYNRIK AP,OSBORN | OSBORN,CYNRIK AP | | 745 | | 1 | | 719 | 26 | | 6 May 2007 - 10:49:27pm | M | YES | YES | |
| 19 | I0816 | Osgood, Christopher
| CHRISTOPHER,OSGOOD | OSGOOD,CHRISTOPHER | | | | 1 | | | | | | M | YES | YES | R |
| 20 | I0814 | Osgood, Mary
Father: Osgood, Christopher
| MARY,OSGOOD | OSGOOD,MARY | | | | 1 | | | | | | F | YES | YES | |
| 21 | I1949 | Otho, Dominus
Father: Gherardini, Gherardo
| DOMINUS,OTHO | OTHO,DOMINUS | | 998 | | 1 | | 944 | 54 | | 5 April 2021 - 12:39:47am | M | YES | YES | |
| 22 | I2590 | Otterbach, Henry
| HENRY,OTTERBACH | OTTERBACH,HENRY | | 327 | | 1 | | 227 | 99 | | | M | YES | YES | R |
| 23 | I1950 | Owain, Angharad ferch
Father: Edwyn, Owain Ap Mother: Goronwy, Morfydd ferch | ANGHARAD FERCH,OWAIN | OWAIN,ANGHARAD FERCH | | 960 | | 1 | | 925 | 35 | | 7 May 2007 - 10:31:05pm | F | YES | YES | |
| 24 | I1951 | Owain, Maredydd Ap
Father: Owain, Owain ap Hywel
| MAREDYDD AP,OWAIN | OWAIN,MAREDYDD AP | | 1087 | | 1 | | 1041 | 46 | | 19 February 2023 - 10:30:52pm | M | YES | YES | |
| 25 | I2859 | Owain, Owain ap Hywel
Father: (unknown), King Hywel the Good
| OWAIN AP HYWEL,OWAIN | OWAIN,OWAIN AP HYWEL | | | | 1 | | | | | 19 February 2023 - 10:34:24pm | M | YES | YES | |