John Griffiths and Margaret Evans

[brains71]

I am looking for anyone who has any information on the descendents of these two people. John was born abt. 1793 in Wrexham, Denbighshire and Married Margaret Evans. They had the following children.
Thomas b 8 Dec 1813 Wrexham
Richard b 22 April 1816 Rhosllanerchrugog
Edward (we have all these descendents)he married Amelia Owens 1851.
Margaret b 10 June 1821 Wrexham
Charles b. 11 Jan 1824 Wrexham
John b 9 April 1826 Wrexham
David b 27 May 1828 Wrexham
Sarah b. 27 Aug 1829 Wrexham
Joseph b 1 Feb 1831 Llanferres
Charlotte b 15 Sept 1833 Wrexham
James b 4 Oct 1836 Wrexham
Elizabeth b abt 1842

Edward came to Australia in 1853 and we would love to know what became of the rest of the family. I am doing this research for an old friend who is trying to find any relatives still in Wales.
Can anyone help?