HI
I have Lewis was Born c 1805
The 1841 Glamorgan census has him listes as living at Craig Berthlwyd
Lewis Lewis b 1806 Tyler
Catherine Lewis wife b 1806
Ann dau b 1833
Mary dau b 1835
Edward Son b 1838
David Son b 1841
which links in with what I have from family details.
In the 1851 Glamorgan cencus the family us listed living in Zoar Fach Lanfabon
with Elizabeth, Mo. b1776 Llandaf. Pauper
This would mean whoever her husband was would had died by now
In the 1861 Glam Census they are at Pantysteddfa in Penrhys. Catherine is not shown, but as a bonus a to me

a William aged 9 is shown

which ponders the thought

did Catherine die in childbirth which would put her at 46 yrs old, I cannot say
I think the Edward b 1776 and Elizabeth b 1781 you have may well be the family living in Lancarfan, but the only child they have listed in the 1841 is a Richard b 1826
Thank in any case, but Elizabeth's husband remains elusive.
I may try Glam records office next week if I get a chance.
Thanks
PeterY