Bishop John Joseph "J.J." McCarthy C.S.Sp. (27 April 1896 – 13 January 1983), was an Irish born, Holy Ghost Father, who served as Bishop to Nairobi, Kenya. Born 28 April 1896 in Doonegan, Milltown Malbay, Co. Clare, 'J.J' was a student at Rockwell College, before going on to Kimmage Manor to train as a priest. He studied at St. Marys, and University College Dublin (obtaining a BA), and was a prefect in Blackrock College. At Rockwell, he played rugby and also played rugby in Blackrock. He was ordained in 1925, and following ordination, he went on his mission to East Africa.