Complete Peerage of England Scotland Ireland Great Britain and the United Kingdom
Sir Richard FOLIOT, of Norton, Fenwick, Grimston, and Wellow (who died in Mar. 1299), by Margery, sister and in her issue heir of Sir Robert D'ESTUTEVILLE, of Gressenhall, Elsing, East Lexham, Weasenham, and Cowesby, and daughter of Sir William D'ESTUTEVILLE, of the same. [Complete Peerage V:238-9]
The cited information was sourced from Book published by Sutton Publishing Ltd in 2000 (Ref: Page: V:538-9) The author/originator was G. E Cokayne.