I need all the help I can get with this one. He married an Emma Mabbott in Australia 29th March 1892 under the name of Max Wilhelm Dappanger in Bowenfels Portland NSW Australia. I have their marriage certificate and it does not state on it at all his birthplace, its been left blank unfortunately. All it has is his occupation, Engine Driver.... sometime after this he has changed his name to William Green..
I just need some help, guidance of where to look from here.

thank you Dianne