This was on Ancestry tree, but the record has no last name
https://www.ancestry.com/sharing/22175615?h=feb782&utm_campaign=bandido-webparts&utm_source=post-share-modal&utm_medium=copy-url
The Bristol Archives reference P/StJB/R/1a corresponds to a record in the earliest parish register for the parish of St John the Baptist, Bristol. [code very common in English Archives, P or PAR for parish, initial letters for parish name, R or RE for register( there are other types or parish records with other codes) followed by the volume.]
It is for the burial of a Charles, son of William and Mary bur 16 Feb 1673 ( so probably a child and the clerk forgot his surname or just missed entering it) https://www.ancestry.co.uk/sharing/22185403?h=7c1f2a&utm_campaign=bandido-webparts&utm_source=post-share-modal&utm_medium=copy-url