margh on Family Tree Circles

Phillips My 3rd great grandfather John Phillips married Margaret Evans in Wales in 1833/1834. John's marriage certificate is PHILIPS BUT everything else is PHILLIPS
Margaret died of Cholera in Merthyr Tydfil Wales on 17 July 1849, buried at St John the Baptist Cemetery,Dowlias, Glamorganshire, Wales.

John came to Australia on the ship "Walter Morrice" Departed from Plymouth,England.On 8 June 1853. Arriving Australia 22 September 1853, With his son Benjamin Phillips age 7 years, Born 7 May 1846 in Merthyr Tidfil, Wales.

Can anyone help me as I can not find out if there were more children, who stayed in Wales, or maybe also died of the Cholera.

I know John was a Miner in Wales, and settled in Lansdowne, New South Wales, Australia, where he died.

Can not seem to find anything on Margaret Evans, or John in Wales.

My Great great grandfather William George Lloyd died 1891 in Cooma NSW Australia, Married on 13 11 1854 in Goulburn NSW Australia, To Mary Mead/Meade, Mary born 1832 & died 9 10 1876 in Cooma NSW Australia.
They had 11 children, My great grandfather was George Alfred Lloyd who married Ada Madeline Mary Johnson Can anyone help me with information on these Please As I can not find where William was born.
Margaret