G'day sinann.
Yes the 1901 census is a help and puts John with his mother and unmarried in 1901. He married Margaret Liston in 1903 and I feel comfortable that the death in 1951 is his as it tallies with his birth in 1870.
I've tracked his brother Matthew Henry and his line.
Going back from there is the tricky bit.
It seems that there were three brothers born to Matthew and Ellen [Thorn] Broggy.
DESCENDANTS OF MATTHEW HENRY AND ELLEN [THORN] BROGGY
Matthew Henry Broggy married Catherine O'Shaughnessy
John Henry Broggy married Margaret Liston
William Henry Broggy married
Can't seem to find anything on William Henry.
Name William Henry
Gender Male
Christening Place 403, Cooley Casey, Clare, Ireland
Birth Date 12 Jul 1871
Birthplace Cooley Casey, Clare, Ireland
Father's Name Mathew Bruggy
Mother's Name Ellen Thom
He's not in the 1901 census.
Appreciate your help.