Since Cawley's argument toward at least Hextilda's maternal ancestry displays wariness, what rationale tilted the scale toward going ahead with who her mother and grandfather were? This is merely a curiosity question.
— "The proofs relating to the claim to the Scottish throne in 1291 made by "dñi Johannis Comyn" name "Hextilde" as daughter and heiress of "Gothrik", son of "Dovenald filius Duncani filii Erici", and "Willelmo" as her son and heir[348]. However, in the Great Roll, John Comyn traced his descent from Bethoc, daughter and heiress of Donald[349]. This conflict in the claimants genealogy is suspicious. In any case, the chronology for Hextildas supposed descent from King Donald Bane is stretched to the limit of credibility. It is suggested that the supposed parentage of Hextilda should be treated with caution."
http://fmg.ac/Projects/MedLands/SCOTTISH%20NOBILITY%20UNTITLED.htm#...
