William Barclay, theologian David Beaton, cardinal and Archbishop of St. Andrews James Beaton, Archbishop of Glasgow and St. Andrews, Primate of Scotland Zachary Boyd, theologian John Caird, theologian and preacher, Principal and Vice-Chancellor of the University of Glasgow (1873–98) Alexander Campbell, co-founder of the Restoration Movement Neil Campbell, minister, Principal of the University of Glasgow (1727 to 1761) Tom Campbell, philosopher and jurist Semyon Desnitsky, legal scholar, professor of the Moscow University William Elphinstone, statesman and bishop, founder of the University of Aberdeen William Hugh Clifford Frend, early church historian Francis Hutcheson, philosopher David Jasper, leader in study of literature and theology John Knox, religious reformer and theologian Kung Lap-yan, a Hong Kong public theologian Cosmo Lang, Archbishop of Canterbury David Livingstone, missionary John Macquarrie, leading 20th century theologian and Professor of Divinity at Union Theological Seminary (NY) and Oxford William McIntyre, minister and educator Andrew Melville, theologian and religious reformer George Newlands, theologian Thomas Reid, philosopher Adam Smith, economist and philosopher Dugald Stewart, philosopher Archibald Campbell Tait, Archbishop of Canterbury R Guy Ramsay, Baptist minister and President of the Baptist Union of Scotland, 1948–49 Daniel Sandford, Bishop of Tasmania Patrick Forbes, Chancellor of Aberdeen University and Bishop of Aberdeen Alexander Peden, one of the leading figures in the Covenanter movement in Scotland. Writers and poets Lin Anderson, writer Julie Bertagna, writer James Boswell, writer William Boyd, writer James Bridie (Osborne Henry Mavor), dramatist and founder of the Glasgow Citizens' Theatre Christopher Brookmyre, writer Luke Brown, writer John Buchan, 1st Baron Tweedsmuir, writer and Governor General of Canada Robert Williams Buchanan, poet C. Delisle Burns, atheist and secularist writer and lecturer Thomas Campbell, poet Robert Crawford, poet, Professor of English at the University of St Andrews A. J. Cronin, physician and writer who's given credit for inspiring the National Health Service Ann Marie Di Mambro, playwright and scriptwriter Hal Duncan, writer Jane Duncan (Elizabeth Jane Cameron), writer Dimitra Fimi, writer and academic Fraser Frisell, friend of Chateaubriand Janice Galloway, writer Robert Cunninghame Graham of Gartmore, poet and politician Alasdair Gray, writer and artist David Gray, poet Janice Hally, playwright and scriptwriter Robert Henryson, poet (probably taught) James Herriot, writer Philip Hobsbaum, poet and critic John Jamieson, lexicographer James Kelman, writer Walter Kennedy, poet Tom Leonard, poet and essayist Liz Lochhead, poet and dramatist Helen MacInnes, "queen of spy writers" Alistair MacLean, writer Ken MacLeod, writer Alasdair MacMhaighstir Alasdair, Gaelic bard