Sir Malcolm Martin Macnaghten KBE, QC (12 January 1869 – 24 January 1955), was a Northern Ireland Unionist politician and judge, the fourth son of Lord Macnaghten, Bt. Sir Malcolm was educated at Eton and Trinity College, Cambridge, where he was President of the Cambridge Union in 1890, he graduated with 1st class honours in history. He was a Cambridge Apostle; he became a Barrister at Lincoln's Inn in 1894, a Bencher in 1915 and King's Counsel (KC) in 1919.