^Browne, W. A. F.; Reaney, P. H.; Wilson, R. M.; Scull, A. (1991). A Dictionary of English Surnames. Tavistock Classics in the History of Psychiatry. Routledge. p. 15. ISBN978-0-415-05737-0. Retrieved 19 August 2018.
^Hanks, Patrick; Hodges, Flavia (2002). The Oxford Names Companion. Oxford University Press. p. 21. ISBN0198605617