Harrison Wexford

[Sinann]

He doesn't have a son called John
http://www.census.nationalarchives.ie/pages/1901/Dublin/Pembroke_West/Upper_Grand_Canal_Street/1287948/

[HarrisonIreland]

My father I think was the eldest son so maybe he was not staying at that address on the date of the census

[Sinann]

It says in 1911 they have four children, so it looks like all the children were at home in 1901.

[HarrisonIreland]

Maybe my fathers father is not called John perhaps it could maybe be Robert as he called my brother Robert

[Sinann]

I can't find a birth to circa 1914 to match the information you have.

There is two things you could try to follow up.
Irish Lights
https://www.irishlights.ie/who-we-are/our-history.aspx
Perhaps if you contact them thay can tell you if they had a Superintendent John Harrison.
Also the Army information, a lot of records were lost but it's worth a try, you could ask on the Armed Forces board here on RootsChat.

[Sinann]

Ah perhaps
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1913/09873/5586355.pdf
You have to prove your not a robot and sign in
Robert John Harrison married Florence Dawson in 1913
His father is John George.

[HarrisonIreland]

Well done this is a great lead and hopefully will lead me to my lost relatives

[Sinann]

Did you have an Uncle Benjamin?
https://civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1915/01369/1564147.pdf

[HarrisonIreland]

I think so he may have died in his 20's