Ef
| Location | Locality | Coordinates (links to map & photo sources) |
OS grid reference |
| Efail-fach | Neath Port Talbot | 51.64° N 03.76° W | SS7895 |
| Efail Isaf | Rhondda, Cynon, Taff | 51.54° N 03.32° W | ST0884 |
| Efailnewydd | Gwynedd | 52.88° N 04.45° W | SH3535 |
| Efailwen | Carmarthenshire | 51.89° N 04.71° W | SN1325 |
| Efenechtyd | Denbighshire | 53.08° N 03.33° W | SJ1155 |
| Effingham | Surrey | 51.26° N 00.41° W | TQ1153 |
| Effirth | Shetland Islands | 60.25° N 01.44° W | HU3152 |
| Effledge | Scottish Borders | 55.42° N 02.71° W | NT5515 |
| Efflinch | Staffordshire | 52.75° N 01.71° W | SK1917 |
| Efford | Devon | 50.38° N 04.11° W | SX5056 |
Read more about this topic: List Of United Kingdom Locations: Ef-El