General Notes

Complete Peerage 2 (1912): 61 (sub Beaumont) states that Katherine Everingham, widow of Sir John Beaumont, Lord Beaumont, "died 1426." No source is given for the death date.
Calendar of Fine Rolls, 15 (1935): 137 indicates that a writ of diem clausit extremum for "Katherine late the wife of John de Bello Monte, 'chivaler'" was issued 1 February 1426/7. As such, it would appear that Katherine (Everingham) Beaumont died shortly before 1 February 1426/7.