Only listed as a miner for Margaret's baptism, others just say Edward and Mary, formerly Williams, of Gwyssaney.
Baptisms for children of John and Mary Williams at Mold (there would appear to be two or even three John and Mary Williams
):
David, 26 Feb 1809 (born 18 Feb), Mary formerly Williams, abode Mold
Mary, 30 July 1809, abode Mold
John and William, 27 Jan 1810 (born 25 Jan), formerly Jones, abode Llwynegrin
William, 11 Nov 1810 (born 5 Nov), formerly Williams, abode Mold
Sarah, 1 March 1812 (born 27 Feb), formerly Jones, abode Llwynegrin
Elizabeth, 11 April 1813, John a labourer, abode Mold
Margaret, 11 April 1813, John a labourer, abode Mold
Griffith, 16 Oct 1814, John a stone cutter, abode Llwynegrin
Roger, 24 Sep 1815, John a joiner, abode Argoed
Joseph, 12 Nov 1815, John a labourer, abode Argoed
Robert, 31 Dec 1815, John a labourer, abode Mold
Edward, 6 Mar 1816, John a labourer, abode Mold
Edward, 22 Jun 1817, John a stone cutter, abode Llwynegrin
Mary, 3 Dec 1817, John a hairdresser, abode Mold
John, 27 Dec 1817, John a joiner, abode Argoed
Bella, 25 April 1818, John a labourer, abode Argoed
Barbara, 19 July 1818, John a labourer, abode Argoed
Only looked from 1808 to 1818 (5 years either side of Elizabeth) but then realised I hadn't found the Sarah from 1841, so extended a search for Sarah and found: Sarah, 13 July 1825, John a joiner, abode Argoed [this may
help with the families].
I guess this means there may be more baptisms from 1818 to 1825 but there are rather a lot of Williamses to look through.
I hope this helps, or at least gives you something to work with
.