Looking for Information on John James Casey Married Theresa Mary Pagon

I believe John James Casey was my great greatgrandfather (born in Co Clare Ireland). He was a draper in Wellington NZ. ? had a son John Joseph Casey born Wellington 1876 (married Maud Mary Urwin aka Eliza Maud)- I am a descendent from that line. John James parents listed on death certificate as James Casey and Mary Elizabeth O'Dwyer. Any information greatly appreciated.