Ancestry won't give you all the answers

Marriage
FEWSTER William 33 years Status Widower Father Edwin FEWSTER
LANGLEY Mary Ann 20 years
Status Single Father Edwin LANGLEY
21 Apr 1873
At Christ Church Strathalbyn Str 95/224
There are no births with father Edwin
LANGLEY in South Australia.
Not helping with Mary Ann's birth but you may find the following useful. Info all needs to be validated where possible.
From
Biographical Index of South Australians - not 100% accurate as there are errors and omissions. This appears to be submitted information.
PROCTOR John
Born c1819 Died 26 Feb 1888 Buried West Terrace Cemetery
Arrived by 1855
Residence Adelaide Religion P.Methodist
Married Ann born 1819 Died 13 Feb 1898
Children Annie Maria BONE 1844-1875, Mary Ann 1854-1855, William 1855-1894, Sarah Elizabeth 1858-1859 , Alfred George 1864-1935
FEWSTER William
Died after 1878
Arrived by 1862
0ccupation Carter Lived Adelaide
Religion Church of England
Married Ruth born 1842 Died 17 Jan 1872 Adelaide SA Buried West Terrace Cemetery
Children - Henry Arthur 1862-1903.
FEWSTER Henry Arthur
Parents Wm and Ruth
Born 31 May 1862 SA Died 18 Mar 1903 Buried Stirling SA
Married 23 May 1887 Adelaide SA Emily nee EDSON
Parents Williamm and Mary Jane nee BAKER born 25 Jun 1856
Bangor SA Died 25 May 1920
Children Ruby Mary Ann 1888-, Arthur William Edson 1889-, Lilian Frances 1891-, Stanley 1894-.
I notice that a number of Wm and Mary Ann
FEWSTER's chn have three names including Harwood and Stirling. Is there a connection with another family with these names?
Cando