Greek birth information

[Essnell]

Hi,  Can anyone here help with getting information on a Greek birth?

I have a Greek Uncle by marriage to my Grand Aunt.  All I have for him is what we have from Australia. so :   
Born: 1890 approximately on the Island of Kytheria off the Greek mainland coast.
Immigrated: To Australia early 1900's? Married my Great Aunt in 1918 in Brisbane, Queensland, Australia.
Died in 1964 in Brisbane Queensland Australia.

Name: Anthony Theodore Andonara.
Father: Theodore Andonara
Mother: Mavamatis Garefalia

Any help here would be greatly appreciated.
Kind regards
Essnell