The William mentioned by Lleucu seems to be the only one in Llanerfyl, although I think it was 1799 rather than 1798.
I may have confused the issue with my previous post. There are two transcriptions for the William baptised on 1st March 1780. The correct one, which is not connected to the image, is William Robert, the illegitimate son of John Robert and Elizabeth Jones. The incorrect transcription of Ingram, is combined with the image, but there is no mention of that name on it.
Familysearch only has has the incorrect transcription, with a link to the image. The surname of Jones is written above Elizabeth.
David