| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Tre-Newydd | city | Powys | United Kingdom | 52.52 | -3.30 | 830 | 1490 |
| Tre-Taliesin | city | Ceredigion | United Kingdom | 52.50 | -3.98 | 387 | 3085 |
| Tre-Vol | city | La Habana | Cuba | 23.03 | -82.37 | 219 | 294612 |
| Tre-groes | city | Ceredigion | United Kingdom | 52.07 | -4.32 | 830 | 2400 |
| Tre-gŵyr | city | Swansea | United Kingdom | 51.65 | -4.04 | 232 | 58024 |