I have found a possible candidate.
Belfast New Letter 3 August 1876
"ROBINSON-ABBOT - May 31, at Christ Church, North Adelaide, South Australia, by the right Rev the Lord Bishop of Adelaide, assisted by the Ven Archdeacon Marryat, William George Robinson Esq, B.A.,T.C.D. eldest son of the Rev William Robinson, Incumbent of Kilwarlin, Hillsborough Co Down, to Mary (Minnie) only daughter of the late Thomas Abbot Esq C.S.E. Dublin"
The William George Robinson in Dublin who married Mary Ann Gunning in Sept 1864 appears to have died in Dublin in 1877. I await the death certificate to confirm.
Rev William Robinson is buried in St John's Kilwarlin. He was Rector there 1876 - 1892