Try the lesser Nobility and Commoners of Wales a lot of good info.
My great grandfather Williams came to the US when my grandfather was 12. Grandfather was John Scott Williams, and Aynard and Conway were also names in the family. Williams is a very common name in Wales as the Welsh were fighting the Britons and many were called Williams’ Men, shortened to Williams. I was told that GG was a ships joiner and youngest son in a very large family. When GGG died, the older children inherited land in Liverpool, but my GG inherited a shipyard which he ran unsuccessfully and moved to the US. One of those men probably GGG was charter member of the first British carpenters’ union. Also it was said that granfather was born in the shadow of Conway castle. He died at age 98, and all but 2 sibling died in 90s. One died younger and other died 103.
My father’s brother was heavily into genealogy. He traced my grandmother’s ancestry back to John Alden and Priscilla Mullins who came over on the Mayflower, married and had many children. They were not Pilgrims but among the others who filled out the ships complement. Another name was Israel Putnam, and on a collateral line, poet William Cullen Bryant and Civil War General Israel Richardson killed at Antietam.
My late husband’s father’s family came from Scotland. GIven his build and coloring I suspect he had a fair share of Neanderthal DNA. His mother also had British ancestry but shortly before she died told him she was 1/8th Cree Indian from an ancestor who was a Canadian trapper with Indian wife. My son had 6 wisdom teeth and dentist asked if he had Eskimo ancestors, so that probably came from the Cree.