According to Richard Borthwick's source William de Herle, t he Chief Justice (who most sources say was father of Margar et), was married to Katherine, daughter of Humphrey Beaucha mp. Richard Borthwick's source has Margaret as granddaught er by a son William de Herle and his wife, a daughter of Si r Philip Courtenay (which Richard Borthwick considers impro bable). The pedigree seems to be somewhat screwed up, bu t I am using the wife given by his source. The dates woul d tend to make Margaret a daughter and not a granddaughter.