These as the years for Joan de Neville:
Birth: circa 1379, Death: circa December 13, 1440
These are the death dates for Joan's presently linked parents, which make it impossible for them to be Joan's parents:
Randolph Neville, 1st Baron Neville de Raby died on April 18, 1331
Euphemia FitzRobert de Clavering died on August 05, 1367