Re: Brynjack Was this a tiny village or the name of a property? I came across this on a census during my searches for a Watkins family. I've mislaid the census but it was either in Radnorshire or Brecknockshire.
Re: Bryngwyn This is the likeliest place so far for my ancestor Sarah Watkins, but does the name have a meaning in some way?
Bryngwyn is a small parish close to Colva but I have never heard of Brynjack - although I am not an expert on the area at all! Have you had a look at an OS map to see if it is shown within the parish?