| Abbreviation | Definition |
|---|---|
| WLMK | William Lyon Mackenzie King |
| WLP | William Lyon Phelps |
| WM | William Moulton |
| WMCD | Walt McDonald, Poet |
| WMH | William Best Hesseltine |
| WMI | King William I |
| WMIV | William Newton, King William IV |
| WMJ | William McIlvaine, Jr. |
| WMY | Whitney M. Young |
| WN | Wayne Newton |
| WN | Willie Nelson |
| WN | Winifred Norbury |
| WOD | Dr. William Orr Dingwall |
| WOFB | Wife OF Bath |
| WOFO | William OF Orange |
| WOJ | Wojciech Tabis, Director of Energy Department, the Polish Ministry of Economy |
| WOJ | Wojtek Gurak, Web Developer |
| WOZ | Steve Wozniak |
| WP | Winnie the POO |
| WPC | Walter P. Chrysler |