Jonathan James Graham Alexander, FBA (born August 1935), known in print as J. J. G. Alexander, is a medievalist and expert on manuscripts, "one of the most profound and wide-ranging of all historians of illuminated manuscripts".Christopher de Hamel, review of 6Tributes to Jonathan J. G. Alexander7, From: The Library: The Transactions of the Bibliographical Society, Vol. 10., No. 4, 2009.