Also on the ame site you will see this
Mr A. Irwin. Application for Passage from Egypt to Australia for Mother-in-law to Australia. It is dated 1922.
This is the year of the child's birth.
Armenia, where you say Izabelle was born, is in the Arab republic of Egypt.
It looks as if she was invited out to be with her daughter and grand children.
On the marriage certificate, dated 7/10/1916 it says her father, Antoine Keligian, was deceased, but no mention is made of the mother.
The full details of this document can be got too.
Sue
Izabelle was only 19 when she married .