Dear followers of the newsgroup, recently I have been searching online about Sir Thomas Musgrave son of Baron Thomas Musgrave. There are conflicting accounts about his motherhood of which of his father's two wifes he was son if he was son of Margaret de Roos or if he was son of Isabel de Berkeley. Which one is the correct one?

His mother Margaret de Roos according to the Visitation Pedigrees. https://archive.org/stream/pedigreesrecorde00sainrich#page/92/mode/2up Page 92 in https://archive.org/details/pedigreesrecorde00sainrich in case it doesn't load properly.