Hello Fisherman,
I'm descended from David's sister Margaret (Williams), who emigrated to the US in 1855 with her 12 children.
Margaret Williams's obituary, mentioning Thomas Richard & Clyn Elen

Margaret's 1820 marriage in Ystradgynlais to William Williams, witness Thomas

1841 census showing Thomas still at Clyn Elen, with John, David, Mary

Margaret's 1854 executrix bond showing David, farmer, and John, collier, of Ystradgynlais

I'm very interested in learning anything I can of this Richard/Richards family in Wales. Have been able to trace a number of descendants of David and brother John and sister Mary (Mathias), but not to the present day.
Thank you,
Kelly Williams
Mount Joy, PA USA