↑ Douglas Richardson. Magna Carta Ancestry: A Study in Colonial and Medieval Families, 4 vols, ed. Kimball G. Everingham, 2nd edition (Salt Lake City: the author, 2011), Vol. I, p. 46, ASFORDBY 13, Google Books
↑ Douglas Richardson. Royal Ancestry: A Study in Colonial and Medieval Families, 5 vols, ed. Kimball G. Everingham (Salt Lake City: the author, 2013), Vol. I, p. 158, ASFORDBY 17
↑ A R Maddison. Lincolnshire Pedigrees, Vol. II, Harleian Society, 1903, pp. 715-716, Internet archive
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