From Jim Weber’s database
https://worldconnect.rootsweb.com/cgi-bin/igm.cgi?op=GET&db=jwe...
Obviously there is a great deal of confusion over everything about Maud, but her first name--and that one of her husbands, at least, was John le Strange. Following are what some respected sources state:
Ancestral Roots (249-32) merely states "Maud de Walton" (no parents, which at least is the simplest way of dealing with Maud). They cite as source "(CP [Complete Peerage] XII (1) 353, 354; C. L'Estrange Ewen, 'Observations on the LeStranges' (1946), chart opp. p. 1; 'LeStrange Records', 184-254)."
Magna Charta Sureties (137-4) states "Maud, perhaps, a de Deyville. (CP XII (1), 352-353; 'Misc. Gen. et Her.', 5th Series, IX 254-8 says she was daughter of Sir John de Wauton of Wauton Deyville. See also 'Pedigree and Progress' (Wagner) ped. 57; 'Le Strange Records, 184-253)."
Burke's Peerage states "Maud, daughter and heiress either of Roger de Deyville, of Walton Deyville, Warwicks, or of Ebles de Montibus, of Ketton, Rutland, leaving (presumably by his 2nd wife, since her putative paternity would account for the unusual forename Ebles being given to the 2nd son)."