Malachi Brendan Martin (Irish: Maolsheachlainn Breandán Ó Máirtín; 23 July 1921 – 27 July 1999), occasionally writing under the pseudonym Michael Serafian, was an Irish Catholic priest and writer on the Catholic Church. Originally ordained as a Jesuit priest, he became Professor of Palaeography at the Vatican's Pontifical Biblical Institute. From 1958, he served as secretary to Cardinal Augustin Bea during preparations for the Second Vatican Council.