Barlow, Frank (1955): , London, s. 288. Burke, John & Bernard, John (1851): , London, bind 2, s. xlvii og stamtavle XXIX. Dunbar, Archibald H. (1899): , Edinburgh, s. 64-65. Everard, Judith; Jones, Michael C. E., red. (1999): . The Boydell Press. King, Edmund (2010): , New Haven, US: Yale University Press. ISBN 978-0-300-11223-8 Oram, Richard (2011): . Edinburgh University Press.