Hi David
Thank you for all that information. On the face of it, it would seem to me that there is a very definite connection!
Since I wrote my original message, I have had great help from another very kind person, mostly in regard to the Edwards side of my family, and I have also sent off for various wills from the NLW, which I am now transcribing and linking up.
While I was in Dolgelly, I saw the marriage record (12th Feb 1763) of Gwen Rhees and Richard Edward, my GGGG Grandparents, who lived at Sebonig, Llanaber, and the witnesses were Griffith Prees and Rowland John. (Their marriage bond is dated 11th February.) At the time, I wasn't sure who Griffith Prees might have been, possibly her father, or as it looks more likely, her brother.
I haven't yet tried to follow up Gwen's family, as I had nothing definite to go on, but it look possible that there is a second link with the Edwards family through the marriage of Richard Edward's daughter, Mary (bap 1780), who could have married Ann's son Rice/Rees.
Although I don't know for sure who Mary married, her eldest brother was known as Edward Richard, also the son of Richard Edward and Gwen Rhees. He, apparently, kept the patronymic name, although a witness on his brother's marriage document in 1800 (Rees Edwards to Ann Jones, my GGG Grandparents) was named as Edward Edwards. I have a copy of Richard Edward's will, but he only refers to him as Edward.
The earliest will I have, so far, transcribed is that of Edward Griffith, Richard's father, who was living at Llwyndu, in Llanaber.
Perhaps we can link these families more definitely, with a bit more research. I'll keep in touch.
Jan