Apply to have your name changed in Victoria.

https://online.justice.vic.gov.au...

https://online.justice.vic.gov.au/CA2574F700805DE7/page/Change+of+name?OpenDocument&1=40-Change+of+name~&2=~&3=~

Provides online search facility for given names in Victoria from 1929 to the end of 2008. You can see the Top 10, 50 or 100 most popular male and/or female given names in each year or decade from 1929 or for the whole period.

https://online.justice.vic.gov.au...

https://online.justice.vic.gov.au/bdm/popular-names

Order and pay for birth, death or marriage certificates.

https://online.justice.vic.gov.au...

https://online.justice.vic.gov.au/CA2574F700805DE7/HomePage?ReadForm&1=Home~&2=~&3=~