Did your Thomas have a brother named David who immigrated to Ohio earlier?
I'm thinking that My David, My gg grandfather is related. I have found several leads that take me to Mineral Ridge and I found in David's Obit that he had a brother named Thomas. From records I have found, I think that he came from Glamorgan, but I have no real proof.
My David lived in Cleveland for awhile, had a son William Evan and ended up in Dover, OH.
He became a US citizen in 1860's. He came in 1854.
I'm pulling this stuff out of my head right now because I don't have my information close-by.
If we are connected, I'll dig and see what more I have.
Matheny, Llewellyn, Stith, Casto, Smoke, Johnson, Schauer/Shower, Dehnen, Kaser, Also-Wozniak, Rasmussen, Lesiak