That's all we know. Walter Thomas Airey had 4 siblings. Frank. Doreen. Jean. Kenneth. His father's brother was his uncle Thomas Airey. Who Lived in Nowra. NSW in later life. Parramatta earlier on.
Was that supposed to be, Mother, "Nora O'LEARY" from "Tasmania, Australia", rather than "Tazmania, Tazmania"?
What is the approximate 'Time' Period for the Birth of "Walter Thomas AIREY"?
Any idea of the locality of the Birth of "Walter Thomas AIREY"?
Are you from "Downunder"?
Just in case, you are not ...
The reason I ask is that, the (island) State of "Tasmania" (just south of the mainland), is separated from the (mainland) Sate of "New South Wales", by, both, a "Sea" (strait); and, another (mainland) State.
Depending on the 'Time' Period, there are "Registries" of "Births; Death; and, Marriages" in ALL the States and Territories of Australia; and, some are available 'On-Line' (well, the "Indexes", anyway).
As an aside ...
Just in case you were not aware ...
There is a 'Group' being "Australian Genealogy", in the "Community.FamilySearch" Forum.
That 'Group' is a "Public" group, that you can join, if you wish.
Can I humbly suggest that, that 'Group' being "Australian Genealogy", in the "Community.FamilySearch" Forum, is a more appropriate place to raise/post this matter of yours; as, a 'Question", requesting help/assistance - regarding research.
That is what the "Community.FamilySearch" Forum is all about ...
Users/Patrons HELPING Users/Patrons ...
[ Rather, than this (New) "IDEAS" ('Feedback') Forum ... ]
I hope this helps.