| 101. | O’BRIEN, Sir JOHN TERENCE NICHOLLS |
| 102. | O’BRYAN, GREGORY |
| 103. | O’CALLAGHAN, EDMUND BAILEY |
| 104. | O’CONNOR, DENIS |
| 105. | O’CONNOR, JOHN |
| 106. | O’CONNOR, WILLIAM JOSEPH |
| 107. | O’DONEL, JAMES LOUIS |
| 108. | O’DONNELL, JAMES |
| 109. | O’DONOGHUE, DANIEL JOHN |
| 110. | O’DONOGHUE, WILLIAM BERNARD |
| 111. | O’GRADY, STANDISH |
| 112. | O’GRADY, WILLIAM JOHN |
| 113. | O’HARA, EDWARD |
| 114. | O’HARA, FELIX |
| 115. | O’HARA, WALTER |
| 116. | O’HEA, TIMOTHY |
| 117. | O’KEEFE, CORNELIUS |
| 118. | O’KEEFE, EUGENE |
| 119. | O’LEARY, HENRY |
| 120. | O’MEARA, FREDERICK AUGUSTUS |
| 121. | O’NEILL, JAMES EDWARD |
| 122. | O’NEILL, JOHN |
| 123. | O’NEILL, MARGARET, named Mother Agatha |
| 124. | O’NEILL, TERENCE JOSEPH |
| 125. | O’REILLY, CHARLES |
| 126. | O’REILLY, GERALD |
| 127. | O’REILLY, HUGH |
| 128. | O’REILLY, JAMES |
| 129. | O’REILLY, PETER |
| 130. | O’SOUP, LOUIS |
| 131. | O’SULLIVAN, DENNIS AMBROSE |
| 132. | O’SULLIVAN, MICHAEL |