| Williams, R | 0 | U | 174425 | Club Unknown |
| Williams, R | 0 | U | 174220 | Downend & Fishponds |
| Williams, R | 0 | M | 149956 | Formby |
| Williams, R | 0 | U | 256054 | Royal Insurance |
| Williams, R | 0 | U | 254410 | Leeds Grammar School |
| Williams, R | 0 | U | 142892 | Hallcross C School |
| Williams, R | 0 | M | 129471 | Wallasey |
| Williams, R | 0 | U | 263009 | Braunstone |
| Williams, R | 0 | U | 121760 | 3Cs |
| Williams, R | 0 | U | 255605 | Malvern |
| Williams, R Gareth | 0 | M | 171446 | Swindon |
| Williams, Raphael | 0 | M | 317169 | Berkshire Junior |
| Williams, Ray | 1687 | M | 121756 | Chester |
| Williams, Ray TF | 0 | M | 121764 | Frome |
| Williams, Reuben | 658 | M | 350805 | Camberley Junior Chess Club |
| Williams, RG | 0 | U | 141647 | Rhyl & Prestatyn |
| Williams, RG | 0 | U | 163457 | Club Unknown |
| Williams, Rhiannon | 0 | U | 209239 | Swansea |
| Williams, Rhiannon | 0 | F | 242626 | East Grinstead |
| Williams, Rhys | 0 | M | 244174 | Pinner * |
| Williams, Rhys | 0 | M | 310111 | Glamorgan Juniors |
| Williams, Rhys N | 0 | M | 260351 | Torquay Grammar School |
| Williams, Rianne | 0 | F | 245780 | Surrey Juniors |
| Williams, Richard | 1930 | M | 301536 | Swindon |
| Williams, Richard P | 1287 | M | 231824 | Ashby |
| Williams, Rob | 0 | M | 282964 | Kingston |
| Williams, Robert | 0 | M | 156958 | St Ives (Huntingdon & Peterborough) |
| Williams, Robert | 0 | M | 259544 | Greater Manchester Congresses |
| Williams, Robert H | 0 | M | 121762 | Eastbourne |
| Williams, Roberts | 0 | M | 258516 | Bury |
| Williams, Robin | 1975 | M | 278368 | Southampton |
| Williams, Robin M | 0 | M | 245082 | Braille CA |
| Williams, Roger | 0 | U | 121755 | Hanham Folk Centre |
| Williams, Roman | 0 | M | 314917 | Worcestershire Juniors |
| Williams, Ron | 0 | M | 297717 | 4NCL The Full Ponty |
| Williams, Ron | 0 | M | 153106 | Isle of Man |
| Williams, Rory | 0 | M | 348811 | Bristol * |
| Williams, Rory | 1513 | M | 225582 | Rothamsted E.S. |
| Williams, Rory | 0 | M | 357616 | Manchester * |
| Williams, Rosa | 0 | F | 347773 | Co Durham * |
| Williams, Rudy | 0 | U | 353163 | Glyn School |
| Williams, Rupert PC | 0 | M | 153492 | Worcester |
| Williams, Russell | 0 | M | 231780 | Herefordshire * |
| Williams, Ryan | 0 | U | 241214 | St Olaves GS |
