I have just read that on Thomas Frederick, they slit up in 1906, therefore Thomas Frances did more that probably move from Dowlais, remarry and had children.
Thomas is likely the one in 1911 already posted.
I gave you the marriages earlier.
You can search on Free BMD
https://www.freebmd.org.uk/cgi/search.pl for these in the indexes to confirm.
You can also search for any children using the mother’s surname and then their marriages. These are just names, no other details.
The deaths of the subsequent wives are also in those indexes but unfortunately I can’t see a relevant death for Thomas Francis.
I have also posted information re the address in Swansea from electoral registers and that newspaper article.
I am hoping that this is the right person of course.