A younger son of Sir Richard Cox, 1st Baronet, Lord Chancellor of Ireland from 1703 to 1707, and his wife Mary Bourne, he was educated at Kilkenny College, Christ Church, Oxford and ordained in 1713.
A younger son of Sir Richard Cox, 1st Baronet, Lord Chancellor of Ireland from 1703 to 1707, and his wife Mary Bourne, he was born on Cork. He was educated at Kilkenny College, Christ Church, Oxford and ordained in 1713.