| Personal Details | |
| Name | Dewi Williams |
| Known As | Dewi |
| Year of Birth | 2010 |
| Eligibility Category | Open/Male |
| Membership Details | |||
| Member Number | 1416015 | ||
| Member Status | Current | ||
| Ranked Club | Wrexham Swimming Club | ||
| Country of International Representation | Wales | ||
| Membership Categories |
| SW Competitive |
| Clubs & Organisations | |
| Club | Ranked |
| Wrexham Swimming Club | Yes |
| Click For Personal Best | 2024 Short Course | Short Course PB | 2024 Long Course | Long Course PB |
| 50m Freestyle | 31.25 | 31.25 | . | 37.58 |
| 100m Freestyle | 1:10.11 | 1:10.11 | . | 1:27.19 |
| 200m Freestyle | . | . | . | . |
| 400m Freestyle | . | . | . | . |
| 800m Freestyle | . | . | . | . |
| 1500m Freestyle | . | . | . | . |
| 50m Breaststroke | . | 41.58 | 41.54 | 41.54 |
| 100m Breaststroke | 1:27.63 | 1:27.63 | . | 1:43.56 |
| 200m Breaststroke | 3:06.83 | 3:06.83 | 3:22.03 | 3:22.03 |
| 50m Butterfly | 37.37 | 37.37 | . | 46.27 |
| 100m Butterfly | 1:25.57 | 1:25.57 | . | . |
| 200m Butterfly | . | . | . | . |
| 50m Backstroke | 38.60 | 38.14 | . | . |
| 100m Backstroke | 1:25.19 | 1:25.19 | . | . |
| 200m Backstroke | . | 3:12.55 | 3:06.87 | 3:06.87 |
| 200m Individual Medley | 2:56.89 | 2:56.89 | . | . |
| 400m Individual Medley | . | . | . | . |
| 100m Individual Medley | . | 1:24.38 | . | . |
 |   |
