# A B C D E F G H I J K L M N O P Q R S T U V W Y Z
| Name | Years | Publication count |
| O'Brien, Pat | 1 | |
| O'Donoghue, P J | 1 | |
| O'Donoghue, Yolande | 1 | |
| O'Grady, Patricia D | 0 | |
| O'Neill, Alison | 1 | |
| O'Neill, Robert K | 1 | |
| O'Sullivan, Donal J | 1 | |
| Oakley, Carey B | 1 | |
| Ogden, Derek | 4 | |
| Oglethorpe, M | 2 | |
| Ōkura, Nagatsune | 1 | |
| Oldham, Arthur Artis | 1 | |
| Olive, John | 2 | |
| Oliveira, Ernesto Veiga de | 1 | |
| Oliver, Charles E | 1 | |
| Oliver, Rowena | 1 | |
| Onions, C T | 2 | |
| Oostindie, Gert | 0 | |
| Opie, Robert | 1 | |
| Oppermann, Philipp | 1 | |
| Orbell, John | 1 | |
| Orchard, Philip | 1 | |
| Orf, Wolfgang | 1 | |
| Orsatelli, Jean | 1 | |
| Ort, George | 1 | |
| Orten-Boving, Jens | 1 | |
| Osborne, Les | 2 | |
| Ottenjann, Helmut | 1 | |
| Ouweneel, Hans | 2 | |
| Ovens, William G | 1 | |
| Over de Linden, Henk | 1 | |
| Overman, Frederick | 1 | |
| Owen, John G | 1 | |
| Oxley, T A | 1 |