Trying to find my Irish roots.

Hi, Mark Green is my name and I am trying to find where I fit in ancestry wise. I have always identified as Irish but fear my connections are too far in the past. My recent family on my fathers side is this-

My Grandmother was Gloria Ross - Born 18 May 1923 Longreach Queensland Australia - Passed 22 August 1983  Brisbane Queensland Australia.

My Great Grandfather was Michael Armstrong Ross - Born 25 August 1892 Mt Morgan Queensland Australia - Passed 19 March 1960 Sydney New South Wales Australia.

My G-Great Grandfather was David Knox Ross - Born 1859 Donaghcloney, Down, Ireland - Passed 7 December 1892 Mt Morgan Queensland Australia.

My G-G-Great Grandfather was Armstrong Ross - Born 1840 Corcreeney, Down, Ireland - Passed 17 March 1926 Rockhampton Queensland Australia.

My G-G-G-Great Grandfather was David Ross - Born 1805 Armagh Ireland - Passed 1860.

I am not sure if I can call myself part of the Ross clan My father always did even though our surname was Green (My grandmother married a Green). I am a proud Australian just looking to the past but my ears always prick up when my father mentions old ladies in the family speaking Gaeilge when he was a child.

I am not even sure what I am looking for with this post, a connection maybe, or perhaps a sense of identity, who knows.

Thanks in advance,

Mark

Slan