As far as Mary Ann(Polly) Goodwin's parents they appear to be an Edward Goodwin given as born in Cefn Mawr in c 1855 and his wife Susan given as born in c 1858 in Cefn Mawr,according to the 1901 census.
I am looking at a marriage at Ruabon St Mary's in 1877 for Edward on North Wales BMD.The choices are a little tricky,they are a Susannah Davies or a Margaret Susan Lemon.I say tricky as I have often seen such a Susannah shortened to Susan!
The GRO equivalent for the marriage is Apr/May/Jun quarter of 1877,Wrexham District of Denbighshire,Volume 11b,Page 507.
Regards
William Russell Jones.