Cilsân
Cilsân is a hamlet in the community of Llangathen in the county of Carmarthenshire, Wales, situated about two miles west of Llandeilo on the north side of the River Tywi.
Etymology
The first element of the name Cilsân is Welsh cil meaning 'nook'. The second is less clear. It may be an unrecorded personal name *Sân or alternatively sân, the local form of saen, borrowed from the English seine, a type of fishing net.The spelling Cilsân is the [List of standardised Welsh language|Welsh place-names in Carmarthenshire|preferred standard form] in both English and Welsh by the Welsh Language Commissioner. Other spellings include the anglicised Kilsane and Cilsane, the latter of which is still used, including on postal addresses held by the Royal Mail, and by a local lodge operator. These contain a final silent e that indicates that the preceding vowel is long.