Photo by Tarmo Soodla
The long form of the name is the longest officially recognised place name in the United Kingdom and one of the longest in the world, being 58 letters in length (51 letters in the Welsh alphabet, where "ch", "ng" and "ll" count as single letters).
The name means: [St.] Mary's Church (Llanfair) [in] the hollow (pwll) of the white hazel (gwyngyll) near (goger) the rapid whirlpool (y chwyrndrobwll) [and] the church of [St.] Tysilio (llantysilio) with a red cave ([a]g ogo goch).
Village's long name cannot be considered an authentic Welsh-language toponym. It was artificially contrived in the 1860s to bestow upon the station the honour of having the longest name of any railway station in Britain; an early example of a publicity stunt.