As stated before... Alfred's parents appear to be William and Mary Jane SIDDOWAY. Mary Jane most likely was Mary Jane AMBLER.
The only way to be really sure is to get a copy of Alfred's birth certificate from the UK which should tell you who his parent's were including mother's maiden name. You can order online via the GRO at
www.gro.gov.ukFreeBMD shows this as a possible birth for Alfred...
March Quarter 1893
Gateshead Durham 10a 966
SIDDOWAY Alfred Harold
Karenlee