Philippa born 1378 cannot be mother of 5th Lord born 1368; the latter's mother could be the other spouse of the fourth lord, Alianore Dagworth 1346-1375. The "About " for the son 1400-1431 correctly identifies his grandmother as Alianore Dagworth
There cannot be a father and son who are both 5th Lord FitzWalter, one is 1368-1406, the other is his son 1400-1431; the superheadings for them read "Walter FitzWalter, 5th Lord FitzWaler" and "Sir Walter FitzWalter, 5th Lord FitzWalter".

