Hmmm... not my line but perhaps I can give a bit of background.
My Simons line arrived in the Llanelli area very early C19, but from Chester-le-Street and of Buckinghamshire origin. There is still a bit of untangling to do on them, but I think I've identified everyone of that family. The first man in that line was William Vazie Simons who was a coal owner and coal merchant in Twmbl, Trimsaran and Llanelli, perhaps elsewhere, died 1843.
Other Simons/Symons lines seem to be of Cornish origin - the mining connection. I suspect there is also, perhaps later in the C19, a Jewish Eastern European immigration also with the Simons surname. There may be other lines too....
