Yi-Yn
| Location | Locality | Coordinates (links to map & photo sources) |
OS grid reference |
| Yieldshields | South Lanarkshire | 55°44′N 3°48′W / 55.73°N 03.80°W / 55.73; -03.80 | NS8750 |
| Yiewsley | Hillingdon | 51°30′N 0°28′W / 51.50°N 00.47°W / 51.50; -00.47 | TQ0680 |
| Ynus-tawelog | Swansea | 51°46′N 4°00′W / 51.76°N 04.00°W / 51.76; -04.00 | SN6209 |
| Ynyns Deullyn | Pembrokeshire | 51°57′N 5°08′W / 51.95°N 05.13°W / 51.95; -05.13 | SM847336 |
| Ynysboeth | Rhondda, Cynon, Taff | 51°39′N 3°20′W / 51.65°N 03.34°W / 51.65; -03.34 | ST0796 |
| Ynysddu | Caerphilly | 51°37′N 3°12′W / 51.62°N 03.20°W / 51.62; -03.20 | ST1792 |
| Ynysforgan | Swansea | 51°40′N 3°55′W / 51.67°N 03.92°W / 51.67; -03.92 | SS6799 |
| Ynyshir | Rhondda, Cynon, Taff | 51°37′N 3°25′W / 51.61°N 03.41°W / 51.61; -03.41 | ST0292 |
| Ynys-isaf | Powys | 51°47′N 3°45′W / 51.78°N 03.75°W / 51.78; -03.75 | SN7911 |
| Ynyslas | Ceredigion | 52°30′N 4°04′W / 52.50°N 04.06°W / 52.50; -04.06 | SN6092 |
| Ynys-Lochtyn | Ceredigion | 52°10′N 4°28′W / 52.16°N 04.46°W / 52.16; -04.46 | SN317546 |
| Ynysmaerdy | Neath Port Talbot | 51°38′N 3°49′W / 51.63°N 03.82°W / 51.63; -03.82 | SS7495 |
| Ynysmaerdy | Rhondda, Cynon, Taff | 51°32′N 3°24′W / 51.54°N 03.40°W / 51.54; -03.40 | ST0384 |
| Ynysmeudwy | Neath Port Talbot | 51°43′N 3°50′W / 51.72°N 03.84°W / 51.72; -03.84 | SN7305 |
| Ynysowen | Merthyr Tydfil | 51°41′N 3°20′W / 51.68°N 03.34°W / 51.68; -03.34 | ST0799 |
| Ynys Tachwedd | Ceredigion | 52°31′N 4°04′W / 52.51°N 04.06°W / 52.51; -04.06 | SN6093 |
| Ynystawe | Swansea | 51°41′N 3°55′W / 51.68°N 03.91°W / 51.68; -03.91 | SN6800 |
| Ynyswen | Powys | 51°48′N 3°41′W / 51.80°N 03.69°W / 51.80; -03.69 | SN8313 |
| Ynyswen | Rhondda, Cynon, Taff | 51°40′N 3°31′W / 51.66°N 03.51°W / 51.66; -03.51 | SS9597 |
| Ynysybwl | Rhondda, Cynon, Taff | 51°38′N 3°22′W / 51.63°N 03.37°W / 51.63; -03.37 | ST0594 |
| Ynysygwas | Neath Port Talbot | 51°36′N 3°46′W / 51.60°N 03.76°W / 51.60; -03.76 | SS7891 |
Read more about this topic: List Of United Kingdom Locations: X-Z, Y