| Abbreviation | Definition |
|---|---|
| NNH | Norman N. Holland |
| NoHo | North Hollywood |
| NP | Nicolas Pitre |
| NPH | Neil Patrick Harris |
| NQ | Nellie Quander |
| NR | Nancy Rowe |
| NR | Nolan Ryan |
| NRT | N. Ross Thompson |
| NS | Neveu Schwarz |
| NTG | Nguyễn Thu Giang |
| NTG | Nick The Greek |
| NV | Nora Villamayor, producer |
| NW | Nikki Wilson |
| NXN | Nixon |
| NY | Nune Yesayan, Armenian pop singer |
| O | Oprah |
| OBE | Old Blue Eyes (Frank Sinatra) |
| OC | Oliver Cromwell |
| OG | Old Gorgeous |
| OHP | Oliver Hazard Perry |