Good Morning teragram31510, thanks so much for your help and information I will certainly search for John Knight, his marriage and family. 
Regards,
Janet 
Janet, his marriage can be found on FreeReg, under Somerset, Long Ashton, the brides's village. The children may have been baptised wherever they subsequently lived, of course, or in a nearby location wherever the vicar happened to be.
It seems to me that you'd fare better researching parish records/archives directly (perhaps via FindMyPast, another subscription site or even Ancestry) rather than taking too much notice of other people's public trees on Ancestry - I've found there are too many inaccuracies, inconsistencies and wild guesses.