Removing Joan Agnes le Scrope, Baroness as a daughter of Ivette Juetta de Ros & Sir Geoffrey le Scrope as these are the parents of her husband Henry Scrope, 1st Baron Scrope of Masham , so they would of been siblings.
There are references for the parents of Henry Scrope but I found none listing a dau. Joan or Agnes as the dau. of Ivetta & Sir Geoffrey Scrope.
