| Abbreviation | Definition |
|---|---|
| BO | Benjamin Oscar |
| BO | Benjamin Owen |
| BO | Bob Otis |
| BO | Bocephus |
| BOB | Robert |
| BOS | Bryan O'Sullivan |
| BOTUS | Bunny Of The United States |
| BRUM | Birmingham |
| BTB | BarTender Ben |
| BVS | Buena Vista Street |
| BW | Brian Wahl |
| C | Casper |
| C | Cher |
| C | Cindy |
| C.S | C.Subramaniam |
| CAL | Charles A. Lindbergh |
| CAM | Camille |
| CAM | Catherine Anne Marie |
| CAMP | Certified Associate in Project Management |
| CAT | Charles Alexander Theodore |