| Name: | Merthyr | CISP No: | MRTHR |
| Place: | Merthyr | Grid Ref: | SN 3520 2080 (GB)
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| Parish: | Merthyr | Stones: | 1 |
| County: | Carmarthenshire (Caerfyrddin) , Wales | Saint(s): | none |
| Site Type: | ecclesiastical |
Westwood/1879, 97: `near Cwrt Derllys, three miles west of Carmarthen'.