| Ong Chee Keong | University Of Sydney |
| Ong Chee Yong | National University Of Singapore |
| Ong Chen Hui | Multimedia University (MMU) |
| Ong Chern Yii | Certificate In Legal Practice (CLP) |
| Ong Chia Wai | Certificate In Legal Practice (CLP) |
| Ong Chin Beng | National University Of Singapore |
| Ong Chin Hong | Certificate In Legal Practice (CLP) |
| Ong Chin Siong | Certificate In Legal Practice (CLP) |
| Ong Chin Wen | Certificate In Legal Practice (CLP) |
| Ong Chin Yew | Certificate In Legal Practice (CLP) |
| Ong Chong Hong | Certificate In Legal Practice (CLP) |
| Ong Chong Hooi | University Of Sydney |
| Ong Chong Ming | Certificate In Legal Practice (CLP) |
| Ong Chor Kweng | Universiti Malaya (UM) |
| Ong Chye Lee, Charles | National University Of Singapore |
| Ong En Du | Certificate In Legal Practice (CLP) |
| Ong Eng Cheng | Certificate In Legal Practice (CLP) |
| Ong Eng Hong | Certificate In Legal Practice (CLP) |
| Ong Eng Khuan | Inner Temple |
| Ong Eng Ming | Lincoln's Inn |